cc: Route offscreen context creation for compositor to the browser.

cc/resource_provider.h

 // Copyright 2012 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 CC_RESOURCE_PROVIDER_H_
 #define CC_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 10 matching lines @@
 #include "cc/transferable_resource.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/size.h"
 
 namespace WebKit {
 class WebGraphicsContext3D;
 }
 
+namespace ui {
+class ContextProvider;
+}
+
 namespace gfx {
 class Rect;
 class Vector2d;
 }
 
 namespace cc {
 
 class TextureUploader;
 
 // This class is not thread-safe and can only be called from the thread it was
@@ skipping 215 matching lines @@
     // until this fence has passed.
     void setReadLockFence(scoped_refptr<Fence> fence) { m_currentReadLockFence = fence; }
     Fence* getReadLockFence() { return m_currentReadLockFence; }
 
     // Enable read lock fences for a specific resource.
     void enableReadLockFences(ResourceProvider::ResourceId, bool enable);
 
     // Indicates if we can currently lock this resource for write.
     bool canLockForWrite(ResourceId);
 
+    ui::ContextProvider* offscreenContextProvider() { return m_offscreenContextProvider.get(); }
+    void setOffscreenContextProvider(scoped_refptr<ui::ContextProvider> offscreenContextProvider);
+
 private:
     struct Resource {
         Resource();
         ~Resource();
         Resource(unsigned textureId, const gfx::Size& size, GLenum format, GLenum filter);
         Resource(uint8_t* pixels, const gfx::Size& size, GLenum format, GLenum filter);
 
         unsigned glId;
         // Pixel buffer used for set pixels without unnecessary copying.
         unsigned glPixelBufferId;
@@ skipping 51 matching lines @@
 
     ResourceType m_defaultResourceType;
     bool m_useTextureStorageExt;
     bool m_useTextureUsageHint;
     bool m_useShallowFlush;
     scoped_ptr<TextureUploader> m_textureUploader;
     scoped_ptr<AcceleratedTextureCopier> m_textureCopier;
     int m_maxTextureSize;
     GLenum m_bestTextureFormat;
 
+    scoped_refptr<ui::ContextProvider> m_offscreenContextProvider;
+
     base::ThreadChecker m_threadChecker;
 
     scoped_refptr<Fence> m_currentReadLockFence;
 
     DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }
 
 #endif  // CC_RESOURCE_PROVIDER_H_