[Android WebView] Implement Ubercomp for Render Thread support

android_webview/browser/deferred_gpu_command_service.h

 // Copyright 2014 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.
 
 #ifndef ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_
 #define ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_
 
 #include <queue>
 
 #include "base/lazy_instance.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_local.h"
 #include "gpu/command_buffer/service/in_process_command_buffer.h"
 
 namespace android_webview {
 
 class ScopedAllowGL {
  public:
   ScopedAllowGL();
   ~ScopedAllowGL();
 
   static bool IsAllowed();
 
  private:
   static base::LazyInstance<base::ThreadLocalBoolean> allow_gl;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedAllowGL);
 };
 
 // TODO(boliu): Teach this class about RT.

[no sievers, 2014/05/20 20:48:26]

Is this TODO taken care of by this patch?

[boliu, 2014/05/21 01:33:26]

This is better rephrased as "avoid PostTask storm" comment I added in the cc
file. Removed this.

 class DeferredGpuCommandService
     : public gpu::InProcessCommandBuffer::Service,
       public base::RefCountedThreadSafe<DeferredGpuCommandService> {
  public:
   static void SetInstance();
+  static DeferredGpuCommandService* GetInstance();
 
   virtual void ScheduleTask(const base::Closure& task) OVERRIDE;
   virtual void ScheduleIdleWork(const base::Closure& task) OVERRIDE;
   virtual bool UseVirtualizedGLContexts() OVERRIDE;
   virtual scoped_refptr<gpu::gles2::ShaderTranslatorCache>
       shader_translator_cache() OVERRIDE;
 
   void RunTasks();
 
   virtual void AddRef() const OVERRIDE;
@@ skipping 11 matching lines @@
   base::Lock tasks_lock_;
   std::queue<base::Closure> tasks_;
 
   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache_;
   DISALLOW_COPY_AND_ASSIGN(DeferredGpuCommandService);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_