cc: [WIP] Use worker context and OrderingBarrierCHROMIUM for one-copy.

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
index d5b57127c205db172299d6cc7048e747779e56a8..4be2ff3c2bd46b35089c7de9bbe329028f89df79 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -33,6 +33,7 @@
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/gfx/gpu_memory_buffer.h"
 
 class GrContext;
 
@@ -331,6 +332,42 @@ class CC_EXPORT ResourceProvider {
     DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGpuMemoryBuffer);
   };
 
+  class CC_EXPORT ScopedWriteLockGpuMemoryBufferForThread {
+   public:
+    ScopedWriteLockGpuMemoryBufferForThread(ResourceProvider* resource_provider,
+                                            ResourceId resource_id);
+    ~ScopedWriteLockGpuMemoryBufferForThread();
+
+    gfx::GpuMemoryBuffer* GetGpuMemoryBuffer();
+    void CreateAndBindImage();
+    ContextProvider* worker_context() { return worker_context_; }
+    void BeginCopyTexture();
+    void EndCopyTexture();
+    ResourceFormat format() { return format_; }
+    gfx::Size size() { return size_; }
+    unsigned source_gl_id() { return source_gl_id_; }
+
+   private:
+    ResourceProvider* resource_provider_;
+    ResourceProvider::Resource* resource_;
+    gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager_;
+    gfx::GpuMemoryBuffer* gpu_memory_buffer_;
+    base::ThreadChecker thread_checker_;
+    ContextProvider* worker_context_;
+    unsigned image_id_;
+    unsigned bound_image_id_;
+    unsigned source_gl_id_;
+    gfx::Size size_;
+    ResourceFormat format_;
+    GLenum internal_format_;
+    bool did_bind_image_;
+    unsigned query_id_;
+    bool using_sync_query_;
+    gfx::GpuMemoryBuffer::Usage usage_;
+
+    DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGpuMemoryBufferForThread);
+  };
+
   class CC_EXPORT ScopedWriteLockGr {
    public:
     ScopedWriteLockGr(ResourceProvider* resource_provider,