gpu: Add the ability to wait on upload completion.

gpu/command_buffer/service/gles2_cmd_decoder.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder.cc b/gpu/command_buffer/service/gles2_cmd_decoder.cc
index 288d7c98d2da4518d47bed697b79757e2db13dea..c8cafa7884d177961dc112045e3380e0bf565ffe 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder.cc
@@ -10157,6 +10157,26 @@ error::Error GLES2DecoderImpl::HandleAsyncTexSubImage2DCHROMIUM(
   return error::kNoError;
 }
 
+error::Error GLES2DecoderImpl::HandleWaitAsyncTexImage2DCHROMIUM(
+    uint32 immediate_data_size, const cmds::WaitAsyncTexImage2DCHROMIUM& c) {
+  TRACE_EVENT0("gpu", "GLES2DecoderImpl::HandleWaitAsyncTexImage2DCHROMIUM");
+  GLenum target = static_cast<GLenum>(c.target);
+
+  if (GL_TEXTURE_2D != target) {
+    SetGLError(GL_INVALID_ENUM, "glWaitAsyncTexImage2DCHROMIUM", "target");
+    return error::kNoError;
+  }
+  Texture* info = GetTextureInfoForTarget(target);
+  if (!info) {
+      SetGLError(GL_INVALID_OPERATION,
+                 "glWaitAsyncTexImage2DCHROMIUM", "unknown texture");
+    return error::kNoError;
+  }
+  async_pixel_transfer_delegate_->WaitForTransferCompletion(
+      info->GetAsyncTransferState());
+  return error::kNoError;
+}
+
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.