Support multiple service instances with GLInProcessContext

android_webview/browser/in_process_view_renderer.h

 // Copyright 2013 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_IN_PROCESS_VIEW_RENDERER_H_
 #define ANDROID_WEBVIEW_BROWSER_IN_PROCESS_VIEW_RENDERER_H_
 
+#include <queue>
 #include <string>
 
 #include "android_webview/browser/browser_view_renderer.h"
 #include "android_webview/browser/gl_view_renderer_manager.h"
 #include "base/cancelable_callback.h"
 #include "content/public/browser/android/synchronous_compositor.h"
 #include "content/public/browser/android/synchronous_compositor_client.h"
+#include "gpu/command_buffer/service/in_process_command_buffer.h"
 #include "ui/gfx/vector2d_f.h"
 
 namespace content {
 class SynchronousCompositor;
 class WebContents;
 }
 
 typedef void* EGLContext;
 class SkCanvas;
 
 namespace android_webview {
 
 class AwGLSurface;
 
+class DeferredGpuCommandService : public gpu::InProcessCommandBuffer::Service {
+ public:
+  DeferredGpuCommandService();
+
+  virtual void ScheduleTask(const base::Closure& task) OVERRIDE;
+  virtual void ScheduleIdleWork(const base::Closure& task) OVERRIDE;
+  virtual bool UseVirtualizedGLContexts() OVERRIDE { return true; }
+
+  void RunTasks();
+
+ protected:
+  virtual ~DeferredGpuCommandService();
+
+ private:
+  base::Lock tasks_lock_;
+  std::queue<base::Closure> tasks_;
+  DISALLOW_COPY_AND_ASSIGN(DeferredGpuCommandService);
+};
+
 // Provides RenderViewHost wrapper functionality for sending WebView-specific
 // IPC messages to the renderer and from there to WebKit.
 class InProcessViewRenderer : public BrowserViewRenderer,
                               public content::SynchronousCompositorClient {
  public:
   static void CalculateTileMemoryPolicy();
 
   InProcessViewRenderer(BrowserViewRenderer::Client* client,
                         JavaHelper* java_helper,
                         content::WebContents* web_contents);
@@ skipping 140 matching lines @@
 
   // Used to prevent rounding errors from accumulating enough to generate
   // visible skew (especially noticeable when scrolling up and down in the same
   // spot over a period of time).
   gfx::Vector2dF overscroll_rounding_error_;
 
   GLViewRendererManager::Key manager_key_;
 
   content::SynchronousCompositorMemoryPolicy memory_policy_;
 
+  scoped_refptr<DeferredGpuCommandService> gl_queue_;
+
   DISALLOW_COPY_AND_ASSIGN(InProcessViewRenderer);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_IN_PROCESS_VIEW_RENDERER_H_