aw: Hook up gpu client tracing

android_webview/browser/aw_render_thread_context_provider.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "android_webview/browser/aw_render_thread_context_provider.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
+#include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/output/context_cache_controller.h"
 #include "cc/output/managed_memory_policy.h"
 #include "gpu/command_buffer/client/gles2_implementation.h"
 #include "gpu/command_buffer/client/gles2_lib.h"
+#include "gpu/command_buffer/client/gles2_trace_implementation.h"
+#include "gpu/command_buffer/client/gpu_switches.h"
 #include "gpu/command_buffer/client/shared_memory_limits.h"
 #include "gpu/ipc/gl_in_process_context.h"
 #include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
 #include "third_party/skia/include/gpu/GrContext.h"
 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
 
 namespace android_webview {
 
 // static
 scoped_refptr<AwRenderThreadContextProvider>
@@ skipping 37 matching lines @@
   limits.min_transfer_buffer_size = 64 * 1024;
 
   context_.reset(gpu::GLInProcessContext::Create(
       service, surface, surface->IsOffscreen(), gpu::kNullSurfaceHandle,
       nullptr /* share_context */, attributes, limits, nullptr, nullptr,
       nullptr));
 
   context_->GetImplementation()->SetLostContextCallback(base::Bind(
       &AwRenderThreadContextProvider::OnLostContext, base::Unretained(this)));
 
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableGpuClientTracing)) {
+    // This wraps the real GLES2Implementation and we should always use this
+    // instead when it's present.
+    trace_impl_.reset(new gpu::gles2::GLES2TraceImplementation(
+        context_->GetImplementation()));
+  }
+
   cache_controller_.reset(
       new cc::ContextCacheController(context_->GetImplementation(), nullptr));
 }
 
 AwRenderThreadContextProvider::~AwRenderThreadContextProvider() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   if (gr_context_)
     gr_context_->releaseResourcesAndAbandonContext();
 }
 
 uint32_t AwRenderThreadContextProvider::GetCopyTextureInternalFormat() {
   // The attributes used in the constructor included an alpha channel.
   return GL_RGBA;
 }
 
 bool AwRenderThreadContextProvider::BindToCurrentThread() {
   // This is called on the thread the context will be used.
   DCHECK(main_thread_checker_.CalledOnValidThread());
 
   return true;
 }
 
 gpu::Capabilities AwRenderThreadContextProvider::ContextCapabilities() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
   return context_->GetImplementation()->capabilities();
 }
 
 gpu::gles2::GLES2Interface* AwRenderThreadContextProvider::ContextGL() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
-
+  if (trace_impl_)
+    return trace_impl_.get();
   return context_->GetImplementation();
 }
 
 gpu::ContextSupport* AwRenderThreadContextProvider::ContextSupport() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
 
   return context_->GetImplementation();
 }
 
 class GrContext* AwRenderThreadContextProvider::GrContext() {
@@ skipping 37 matching lines @@
 void AwRenderThreadContextProvider::OnLostContext() {
   DCHECK(main_thread_checker_.CalledOnValidThread());
 
   if (!lost_context_callback_.is_null())
     lost_context_callback_.Run();
   if (gr_context_)
     gr_context_->abandonContext();
 }
 
 }  // namespace android_webview