Remove unused PushId and struct MaxPushIdFrame.

PiperOrigin-RevId: 442575091
diff --git a/quiche/quic/core/http/http_decoder.cc b/quiche/quic/core/http/http_decoder.cc
index 0008d14..5845a37 100644
--- a/quiche/quic/core/http/http_decoder.cc
+++ b/quiche/quic/core/http/http_decoder.cc
@@ -528,8 +528,8 @@
       return visitor_->OnGoAwayFrame(frame);
     }
     case static_cast<uint64_t>(HttpFrameType::MAX_PUSH_ID): {
-      MaxPushIdFrame frame;
-      if (!reader->ReadVarInt62(&frame.push_id)) {
+      uint64_t unused;
+      if (!reader->ReadVarInt62(&unused)) {
         RaiseError(QUIC_HTTP_FRAME_ERROR,
                    "Unable to read MAX_PUSH_ID push_id.");
         return false;
@@ -539,7 +539,7 @@
                    "Superfluous data in MAX_PUSH_ID frame.");
         return false;
       }
-      return visitor_->OnMaxPushIdFrame(frame);
+      return visitor_->OnMaxPushIdFrame();
     }
     case static_cast<uint64_t>(HttpFrameType::PRIORITY_UPDATE_REQUEST_STREAM): {
       PriorityUpdateFrame frame;
diff --git a/quiche/quic/core/http/http_decoder.h b/quiche/quic/core/http/http_decoder.h
index 137755e..ac68276 100644
--- a/quiche/quic/core/http/http_decoder.h
+++ b/quiche/quic/core/http/http_decoder.h
@@ -45,7 +45,7 @@
     // processed.  At that point it is safe to consume |header_length| bytes.
 
     // Called when a MAX_PUSH_ID frame has been successfully parsed.
-    virtual bool OnMaxPushIdFrame(const MaxPushIdFrame& frame) = 0;
+    virtual bool OnMaxPushIdFrame() = 0;
 
     // Called when a GOAWAY frame has been successfully parsed.
     virtual bool OnGoAwayFrame(const GoAwayFrame& frame) = 0;
diff --git a/quiche/quic/core/http/http_decoder_test.cc b/quiche/quic/core/http/http_decoder_test.cc
index f385410..5e3d6d6 100644
--- a/quiche/quic/core/http/http_decoder_test.cc
+++ b/quiche/quic/core/http/http_decoder_test.cc
@@ -45,8 +45,7 @@
   // Called if an error is detected.
   MOCK_METHOD(void, OnError, (HttpDecoder*), (override));
 
-  MOCK_METHOD(bool, OnMaxPushIdFrame, (const MaxPushIdFrame& frame),
-              (override));
+  MOCK_METHOD(bool, OnMaxPushIdFrame, (), (override));
   MOCK_METHOD(bool, OnGoAwayFrame, (const GoAwayFrame& frame), (override));
   MOCK_METHOD(bool, OnSettingsFrameStart, (QuicByteCount header_length),
               (override));
@@ -90,7 +89,7 @@
 class HttpDecoderTest : public QuicTest {
  public:
   HttpDecoderTest() : decoder_(&visitor_) {
-    ON_CALL(visitor_, OnMaxPushIdFrame(_)).WillByDefault(Return(true));
+    ON_CALL(visitor_, OnMaxPushIdFrame()).WillByDefault(Return(true));
     ON_CALL(visitor_, OnGoAwayFrame(_)).WillByDefault(Return(true));
     ON_CALL(visitor_, OnSettingsFrameStart(_)).WillByDefault(Return(true));
     ON_CALL(visitor_, OnSettingsFrame(_)).WillByDefault(Return(true));
@@ -230,20 +229,19 @@
       "01");  // Push Id
 
   // Visitor pauses processing.
-  EXPECT_CALL(visitor_, OnMaxPushIdFrame(MaxPushIdFrame({1})))
-      .WillOnce(Return(false));
+  EXPECT_CALL(visitor_, OnMaxPushIdFrame()).WillOnce(Return(false));
   EXPECT_EQ(input.size(), ProcessInputWithGarbageAppended(input));
   EXPECT_THAT(decoder_.error(), IsQuicNoError());
   EXPECT_EQ("", decoder_.error_detail());
 
   // Process the full frame.
-  EXPECT_CALL(visitor_, OnMaxPushIdFrame(MaxPushIdFrame({1})));
+  EXPECT_CALL(visitor_, OnMaxPushIdFrame());
   EXPECT_EQ(input.size(), ProcessInput(input));
   EXPECT_THAT(decoder_.error(), IsQuicNoError());
   EXPECT_EQ("", decoder_.error_detail());
 
   // Process the frame incrementally.
-  EXPECT_CALL(visitor_, OnMaxPushIdFrame(MaxPushIdFrame({1})));
+  EXPECT_CALL(visitor_, OnMaxPushIdFrame());
   ProcessInputCharByChar(input);
   EXPECT_THAT(decoder_.error(), IsQuicNoError());
   EXPECT_EQ("", decoder_.error_detail());
diff --git a/quiche/quic/core/http/http_frames.h b/quiche/quic/core/http/http_frames.h
index eae52ee..b96c5fb 100644
--- a/quiche/quic/core/http/http_frames.h
+++ b/quiche/quic/core/http/http_frames.h
@@ -20,9 +20,6 @@
 
 namespace quic {
 
-// TODO(b/171463363): Remove.
-using PushId = uint64_t;
-
 enum class HttpFrameType {
   DATA = 0x0,
   HEADERS = 0x1,
@@ -101,18 +98,6 @@
   bool operator==(const GoAwayFrame& rhs) const { return id == rhs.id; }
 };
 
-// 7.2.7.  MAX_PUSH_ID
-//
-//   The MAX_PUSH_ID frame (type=0xD) is used by clients to control the
-//   number of server pushes that the server can initiate.
-struct QUIC_EXPORT_PRIVATE MaxPushIdFrame {
-  PushId push_id;
-
-  bool operator==(const MaxPushIdFrame& rhs) const {
-    return push_id == rhs.push_id;
-  }
-};
-
 // https://httpwg.org/http-extensions/draft-ietf-httpbis-priority.html
 //
 // The PRIORITY_UPDATE frame specifies the sender-advised priority of a stream.
diff --git a/quiche/quic/core/http/http_frames_test.cc b/quiche/quic/core/http/http_frames_test.cc
index 1eefd7e..446a6b9 100644
--- a/quiche/quic/core/http/http_frames_test.cc
+++ b/quiche/quic/core/http/http_frames_test.cc
@@ -44,17 +44,6 @@
   EXPECT_TRUE(a == b);
 }
 
-TEST(HttpFramesTest, MaxPushIdFrame) {
-  MaxPushIdFrame a{1};
-  EXPECT_TRUE(a == a);
-
-  MaxPushIdFrame b{2};
-  EXPECT_FALSE(a == b);
-
-  b.push_id = 1;
-  EXPECT_TRUE(a == b);
-}
-
 TEST(HttpFramesTest, PriorityUpdateFrame) {
   PriorityUpdateFrame a{REQUEST_STREAM, 0, ""};
   EXPECT_TRUE(a == a);
diff --git a/quiche/quic/core/http/quic_receive_control_stream.cc b/quiche/quic/core/http/quic_receive_control_stream.cc
index 1eba8f5..c0a76af 100644
--- a/quiche/quic/core/http/quic_receive_control_stream.cc
+++ b/quiche/quic/core/http/quic_receive_control_stream.cc
@@ -62,8 +62,7 @@
   stream_delegate()->OnStreamError(decoder->error(), decoder->error_detail());
 }
 
-bool QuicReceiveControlStream::OnMaxPushIdFrame(
-    const MaxPushIdFrame& /*frame*/) {
+bool QuicReceiveControlStream::OnMaxPushIdFrame() {
   return ValidateFrameType(HttpFrameType::MAX_PUSH_ID);
 }
 
diff --git a/quiche/quic/core/http/quic_receive_control_stream.h b/quiche/quic/core/http/quic_receive_control_stream.h
index 0cf34fa..71d0bf2 100644
--- a/quiche/quic/core/http/quic_receive_control_stream.h
+++ b/quiche/quic/core/http/quic_receive_control_stream.h
@@ -35,7 +35,7 @@
 
   // HttpDecoder::Visitor implementation.
   void OnError(HttpDecoder* decoder) override;
-  bool OnMaxPushIdFrame(const MaxPushIdFrame& frame) override;
+  bool OnMaxPushIdFrame() override;
   bool OnGoAwayFrame(const GoAwayFrame& frame) override;
   bool OnSettingsFrameStart(QuicByteCount header_length) override;
   bool OnSettingsFrame(const SettingsFrame& frame) override;
diff --git a/quiche/quic/core/http/quic_spdy_session.cc b/quiche/quic/core/http/quic_spdy_session.cc
index 58ce9ac..b90fba9 100644
--- a/quiche/quic/core/http/quic_spdy_session.cc
+++ b/quiche/quic/core/http/quic_spdy_session.cc
@@ -74,7 +74,7 @@
 
   // HttpDecoder::Visitor implementation.
   void OnError(HttpDecoder* /*decoder*/) override {}
-  bool OnMaxPushIdFrame(const MaxPushIdFrame& /*frame*/) override {
+  bool OnMaxPushIdFrame() override {
     error_detail_ = "MAX_PUSH_ID frame forbidden";
     return false;
   }
diff --git a/quiche/quic/core/http/quic_spdy_session_test.cc b/quiche/quic/core/http/quic_spdy_session_test.cc
index 8636a75..c625f49 100644
--- a/quiche/quic/core/http/quic_spdy_session_test.cc
+++ b/quiche/quic/core/http/quic_spdy_session_test.cc
@@ -1300,8 +1300,7 @@
   }
 
   EXPECT_FALSE(session_.goaway_received());
-  PushId push_id1 = 0;
-  session_.OnHttp3GoAway(push_id1);
+  session_.OnHttp3GoAway(/* id = */ 0);
   EXPECT_TRUE(session_.goaway_received());
 
   EXPECT_CALL(
@@ -1310,8 +1309,7 @@
           QUIC_HTTP_GOAWAY_ID_LARGER_THAN_PREVIOUS,
           "GOAWAY received with ID 1 greater than previously received ID 0",
           _));
-  PushId push_id2 = 1;
-  session_.OnHttp3GoAway(push_id2);
+  session_.OnHttp3GoAway(/* id = */ 1);
 }
 
 // Test that server session will send a connectivity probe in response to a
diff --git a/quiche/quic/core/http/quic_spdy_stream.cc b/quiche/quic/core/http/quic_spdy_stream.cc
index 52df689..2a460c3 100644
--- a/quiche/quic/core/http/quic_spdy_stream.cc
+++ b/quiche/quic/core/http/quic_spdy_stream.cc
@@ -53,7 +53,7 @@
     stream_->OnUnrecoverableError(decoder->error(), decoder->error_detail());
   }
 
-  bool OnMaxPushIdFrame(const MaxPushIdFrame& /*frame*/) override {
+  bool OnMaxPushIdFrame() override {
     CloseConnectionOnWrongFrame("Max Push Id");
     return false;
   }