Rename SpdyHeaderBlock to Http2HeaderBlock.

Salvaged from a botched Zwingli attempt:
http://refactor/16032281396283088571 created by go/Zwingli

Tested:
    TAP for global presubmit queue passed after automated deflaking of failures: http://mondo/deflaker/run/9a9c8d4e-50d0-47e0-970b-4b6c24ace2d7 http://mondo/deflaker/run/32a00ba5-16fa-4c78-9e10-afa7c56abc61
    http://test/OCL:338336205:BASE:339106963:1603774283861:13fcf12c
PiperOrigin-RevId: 339252455
Change-Id: Icce13789ba4b6e74894b0715ec897fc61aba9993
diff --git a/spdy/core/spdy_framer.cc b/spdy/core/spdy_framer.cc
index e5619df..d425bdd 100644
--- a/spdy/core/spdy_framer.cc
+++ b/spdy/core/spdy_framer.cc
@@ -45,7 +45,7 @@
 // The size of one parameter in SETTINGS frame.
 const size_t kOneSettingParameterSize = 6;
 
-size_t GetUncompressedSerializedLength(const SpdyHeaderBlock& headers) {
+size_t GetUncompressedSerializedLength(const Http2HeaderBlock& headers) {
   const size_t num_name_value_pairs_size = sizeof(uint32_t);
   const size_t length_of_name_size = num_name_value_pairs_size;
   const size_t length_of_value_size = num_name_value_pairs_size;
diff --git a/spdy/core/spdy_framer_test.cc b/spdy/core/spdy_framer_test.cc
index cd96457..3ddaec5 100644
--- a/spdy/core/spdy_framer_test.cc
+++ b/spdy/core/spdy_framer_test.cc
@@ -532,7 +532,7 @@
   SpdyFrameType header_control_type_;
   bool header_buffer_valid_;
   std::unique_ptr<TestHeadersHandler> headers_handler_;
-  SpdyHeaderBlock headers_;
+  Http2HeaderBlock headers_;
   bool header_has_priority_;
   SpdyStreamId header_parent_stream_id_;
   bool header_exclusive_;
@@ -1102,7 +1102,7 @@
   SpdyFramer framer(SpdyFramer::DISABLE_COMPRESSION);
   std::string value("value1\0value2", 13);
   // TODO(jgraettinger): If this pattern appears again, move to test class.
-  SpdyHeaderBlock header_set;
+  Http2HeaderBlock header_set;
   header_set["name"] = value;
   std::string buffer;
   HpackEncoder encoder;
@@ -2304,7 +2304,7 @@
   };
   // frame-format on
 
-  SpdyHeaderBlock header_block;
+  Http2HeaderBlock header_block;
   header_block["bar"] = "foo";
   header_block["foo"] = "bar";
   auto buffer = std::make_unique<std::string>();
diff --git a/spdy/core/spdy_protocol.cc b/spdy/core/spdy_protocol.cc
index 53901ab..f9a1800 100644
--- a/spdy/core/spdy_protocol.cc
+++ b/spdy/core/spdy_protocol.cc
@@ -276,7 +276,7 @@
 
 SpdyFrameWithHeaderBlockIR::SpdyFrameWithHeaderBlockIR(
     SpdyStreamId stream_id,
-    SpdyHeaderBlock header_block)
+    Http2HeaderBlock header_block)
     : SpdyFrameWithFinIR(stream_id), header_block_(std::move(header_block)) {}
 
 SpdyFrameWithHeaderBlockIR::~SpdyFrameWithHeaderBlockIR() = default;
diff --git a/spdy/core/spdy_protocol.h b/spdy/core/spdy_protocol.h
index 4c9c79a..a2b9c4d 100644
--- a/spdy/core/spdy_protocol.h
+++ b/spdy/core/spdy_protocol.h
@@ -492,8 +492,8 @@
  public:
   ~SpdyFrameWithHeaderBlockIR() override;
 
-  const SpdyHeaderBlock& header_block() const { return header_block_; }
-  void set_header_block(SpdyHeaderBlock header_block) {
+  const Http2HeaderBlock& header_block() const { return header_block_; }
+  void set_header_block(Http2HeaderBlock header_block) {
     // Deep copy.
     header_block_ = std::move(header_block);
   }
@@ -503,13 +503,13 @@
 
  protected:
   SpdyFrameWithHeaderBlockIR(SpdyStreamId stream_id,
-                             SpdyHeaderBlock header_block);
+                             Http2HeaderBlock header_block);
   SpdyFrameWithHeaderBlockIR(const SpdyFrameWithHeaderBlockIR&) = delete;
   SpdyFrameWithHeaderBlockIR& operator=(const SpdyFrameWithHeaderBlockIR&) =
       delete;
 
  private:
-  SpdyHeaderBlock header_block_;
+  Http2HeaderBlock header_block_;
 };
 
 class QUICHE_EXPORT_PRIVATE SpdyDataIR : public SpdyFrameWithFinIR {
@@ -706,8 +706,8 @@
 class QUICHE_EXPORT_PRIVATE SpdyHeadersIR : public SpdyFrameWithHeaderBlockIR {
  public:
   explicit SpdyHeadersIR(SpdyStreamId stream_id)
-      : SpdyHeadersIR(stream_id, SpdyHeaderBlock()) {}
-  SpdyHeadersIR(SpdyStreamId stream_id, SpdyHeaderBlock header_block)
+      : SpdyHeadersIR(stream_id, Http2HeaderBlock()) {}
+  SpdyHeadersIR(SpdyStreamId stream_id, Http2HeaderBlock header_block)
       : SpdyFrameWithHeaderBlockIR(stream_id, std::move(header_block)) {}
   SpdyHeadersIR(const SpdyHeadersIR&) = delete;
   SpdyHeadersIR& operator=(const SpdyHeadersIR&) = delete;
@@ -775,10 +775,10 @@
     : public SpdyFrameWithHeaderBlockIR {
  public:
   SpdyPushPromiseIR(SpdyStreamId stream_id, SpdyStreamId promised_stream_id)
-      : SpdyPushPromiseIR(stream_id, promised_stream_id, SpdyHeaderBlock()) {}
+      : SpdyPushPromiseIR(stream_id, promised_stream_id, Http2HeaderBlock()) {}
   SpdyPushPromiseIR(SpdyStreamId stream_id,
                     SpdyStreamId promised_stream_id,
-                    SpdyHeaderBlock header_block)
+                    Http2HeaderBlock header_block)
       : SpdyFrameWithHeaderBlockIR(stream_id, std::move(header_block)),
         promised_stream_id_(promised_stream_id),
         padded_(false),
diff --git a/spdy/core/spdy_test_utils.h b/spdy/core/spdy_test_utils.h
index aaaa65a..c6390a7 100644
--- a/spdy/core/spdy_test_utils.h
+++ b/spdy/core/spdy_test_utils.h
@@ -18,7 +18,7 @@
 namespace spdy {
 
 inline bool operator==(absl::string_view x,
-                       const SpdyHeaderBlock::ValueProxy& y) {
+                       const Http2HeaderBlock::ValueProxy& y) {
   return y.operator==(x);
 }
 
@@ -54,14 +54,14 @@
   void OnHeaderBlockEnd(size_t header_bytes_parsed,
                         size_t compressed_header_bytes_parsed) override;
 
-  const SpdyHeaderBlock& decoded_block() const { return block_; }
+  const Http2HeaderBlock& decoded_block() const { return block_; }
   size_t header_bytes_parsed() const { return header_bytes_parsed_; }
   size_t compressed_header_bytes_parsed() const {
     return compressed_header_bytes_parsed_;
   }
 
  private:
-  SpdyHeaderBlock block_;
+  Http2HeaderBlock block_;
   size_t header_bytes_parsed_ = 0;
   size_t compressed_header_bytes_parsed_ = 0;
 };