Move quic::QuicEndian to quiche::QuicheEndian

This change will enable us to reuse the endian library in new third_party repos without introducing a dependency on //third_party/quic.

gfe-relnote: Refactor of QUIC Endian library
PiperOrigin-RevId: 281406510
Change-Id: If1b72425a799bad7469281f32a12d6630fe787c4
diff --git a/quic/core/quic_stream_send_buffer_test.cc b/quic/core/quic_stream_send_buffer_test.cc
index 4a37c1e..90fcd6e 100644
--- a/quic/core/quic_stream_send_buffer_test.cc
+++ b/quic/core/quic_stream_send_buffer_test.cc
@@ -64,7 +64,7 @@
   void WriteAllData() {
     // Write all data.
     char buf[4000];
-    QuicDataWriter writer(4000, buf, HOST_BYTE_ORDER);
+    QuicDataWriter writer(4000, buf, quiche::HOST_BYTE_ORDER);
     send_buffer_.WriteStreamData(0, 3840u, &writer);
 
     send_buffer_.OnStreamDataConsumed(3840u);
@@ -78,7 +78,7 @@
 
 TEST_F(QuicStreamSendBufferTest, CopyDataToBuffer) {
   char buf[4000];
-  QuicDataWriter writer(4000, buf, HOST_BYTE_ORDER);
+  QuicDataWriter writer(4000, buf, quiche::HOST_BYTE_ORDER);
   std::string copy1(1024, 'a');
   std::string copy2 =
       std::string(512, 'a') + std::string(256, 'b') + std::string(256, 'c');
@@ -95,7 +95,7 @@
   EXPECT_EQ(copy4, QuicStringPiece(buf + 3072, 768));
 
   // Test data piece across boundries.
-  QuicDataWriter writer2(4000, buf, HOST_BYTE_ORDER);
+  QuicDataWriter writer2(4000, buf, quiche::HOST_BYTE_ORDER);
   std::string copy5 =
       std::string(536, 'a') + std::string(256, 'b') + std::string(232, 'c');
   ASSERT_TRUE(send_buffer_.WriteStreamData(1000, 1024, &writer2));
@@ -105,7 +105,7 @@
   EXPECT_EQ(copy6, QuicStringPiece(buf + 1024, 1024));
 
   // Invalid data copy.
-  QuicDataWriter writer3(4000, buf, HOST_BYTE_ORDER);
+  QuicDataWriter writer3(4000, buf, quiche::HOST_BYTE_ORDER);
   EXPECT_FALSE(send_buffer_.WriteStreamData(3000, 1024, &writer3));
   EXPECT_QUIC_BUG(send_buffer_.WriteStreamData(0, 4000, &writer3),
                   "Writer fails to write.");
@@ -123,7 +123,7 @@
       std::string(512, 'a') + std::string(256, 'b') + std::string(256, 'c');
   std::string copy3 = std::string(1024, 'c') + std::string(100, 'd');
   char buf[6000];
-  QuicDataWriter writer(6000, buf, HOST_BYTE_ORDER);
+  QuicDataWriter writer(6000, buf, quiche::HOST_BYTE_ORDER);
   // Write more than one slice.
   EXPECT_EQ(0, QuicStreamSendBufferPeer::write_index(&send_buffer_));
   ASSERT_TRUE(send_buffer_.WriteStreamData(0, 1024, &writer));
@@ -290,7 +290,7 @@
 
 TEST_F(QuicStreamSendBufferTest, CurrentWriteIndex) {
   char buf[4000];
-  QuicDataWriter writer(4000, buf, HOST_BYTE_ORDER);
+  QuicDataWriter writer(4000, buf, quiche::HOST_BYTE_ORDER);
   // With data buffered, index points to the 1st slice of data.
   EXPECT_EQ(0u,
             QuicStreamSendBufferPeer::CurrentWriteSlice(&send_buffer_)->offset);