gpu: Reuse transfer buffers more aggresively

gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
index e72d47c9baca5fe94385ee723922c7e95e3f6115..afb2bd0e205ae59b83db631ef9c546987f3d86c4 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
@@ -8050,12 +8050,16 @@ TEST_F(GLES2DecoderManualInitTest, AsyncPixelTransfers) {
   // Tex(Sub)Image2D upload commands.
   AsyncTexImage2DCHROMIUM teximage_cmd;
   teximage_cmd.Init(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA,
-                    GL_UNSIGNED_BYTE, kSharedMemoryId, kSharedMemoryOffset);
+                    GL_UNSIGNED_BYTE, kSharedMemoryId, kSharedMemoryOffset,
+                    0, 0, 0);
   AsyncTexSubImage2DCHROMIUM texsubimage_cmd;
   texsubimage_cmd.Init(GL_TEXTURE_2D, 0, 0, 0, 8, 8, GL_RGBA,
-                      GL_UNSIGNED_BYTE, kSharedMemoryId, kSharedMemoryOffset);
+                      GL_UNSIGNED_BYTE, kSharedMemoryId, kSharedMemoryOffset,
+                      0, 0, 0);
   WaitAsyncTexImage2DCHROMIUM wait_cmd;
   wait_cmd.Init(GL_TEXTURE_2D);
+  WaitAllAsyncTexImage2DCHROMIUM wait_all_cmd;
+  wait_all_cmd.Init();
 
   // No transfer state exists initially.
   EXPECT_FALSE(
@@ -8216,6 +8220,46 @@ TEST_F(GLES2DecoderManualInitTest, AsyncPixelTransfers) {
     EXPECT_EQ(error::kNoError, ExecuteCmd(wait_cmd));
     EXPECT_EQ(GL_NO_ERROR, GetGLError());
   }
+
+  // WaitAllAsyncTexImage2D
+  EXPECT_CALL(*delegate, Destroy()).RetiresOnSaturation();
+  DoDeleteTexture(client_texture_id_, kServiceTextureId);
+  EXPECT_FALSE(
+      decoder_->GetAsyncPixelTransferManager()->GetPixelTransferDelegate(
+          texture_ref));
+  texture->SetImmutable(false);
+  delegate = NULL;
+  {
+    // Get a fresh texture since the existing texture cannot be respecified
+    // asynchronously and AsyncTexSubImage2D does not involved binding.
+    EXPECT_CALL(*gl_, GenTextures(1, _))
+        .WillOnce(SetArgumentPointee<1>(kServiceTextureId));
+    DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+    texture_ref = GetTexture(client_texture_id_);
+    texture = texture_ref->texture();
+    texture->SetImmutable(false);
+    // Create transfer state since it doesn't exist.
+    EXPECT_CALL(*manager, CreatePixelTransferDelegateImpl(texture_ref, _))
+        .WillOnce(Return(
+            delegate = new StrictMock<gpu::MockAsyncPixelTransferDelegate>))
+        .RetiresOnSaturation();
+    EXPECT_CALL(*delegate, AsyncTexImage2D(_, _, _))
+        .RetiresOnSaturation();
+    // Start async transfer.
+    EXPECT_EQ(error::kNoError, ExecuteCmd(teximage_cmd));
+    EXPECT_EQ(GL_NO_ERROR, GetGLError());
+    EXPECT_EQ(
+        delegate,
+        decoder_->GetAsyncPixelTransferManager()->GetPixelTransferDelegate(
+            texture_ref));
+
+    EXPECT_TRUE(texture->IsImmutable());
+    // Wait for completion of all uploads.
+    EXPECT_CALL(*manager, WaitAllAsyncTexImage2D()).RetiresOnSaturation();
+    EXPECT_CALL(*manager, BindCompletedAsyncTransfers());
+    EXPECT_EQ(error::kNoError, ExecuteCmd(wait_all_cmd));
+    EXPECT_EQ(GL_NO_ERROR, GetGLError());
+  }
 }
 
 TEST_F(GLES2DecoderManualInitTest, AsyncPixelTransferManager) {
@@ -8239,7 +8283,8 @@ TEST_F(GLES2DecoderManualInitTest, AsyncPixelTransferManager) {
 
   AsyncTexImage2DCHROMIUM teximage_cmd;
   teximage_cmd.Init(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA,
-                    GL_UNSIGNED_BYTE, kSharedMemoryId, kSharedMemoryOffset);
+                    GL_UNSIGNED_BYTE, kSharedMemoryId, kSharedMemoryOffset,
+                    0, 0, 0);
 
   // No transfer delegate exists initially.
   EXPECT_FALSE(