Re-land: cc: Use worker context for one-copy tile initialization.

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 324df1bab3a701f52f4c8d1afc8e334ba2ff8748..8b7ccd85e3bf92e72f8158f79819012bcbeec0cd 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -35,6 +35,7 @@
 #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;
 
@@ -46,7 +47,6 @@ class GLES2Interface;
 }
 
 namespace gfx {
-class GpuMemoryBuffer;
 class Rect;
 class Vector2d;
 }
@@ -88,7 +88,6 @@ class CC_EXPORT ResourceProvider
       int highp_threshold_min,
       bool use_rgba_4444_texture_format,
       size_t id_allocation_chunk_size,
-      bool use_persistent_map_for_gpu_memory_buffers,
       const std::vector<unsigned>& use_image_texture_targets);
   ~ResourceProvider() override;
 
@@ -104,8 +103,8 @@ class CC_EXPORT ResourceProvider
   }
   ResourceFormat yuv_resource_format() const { return yuv_resource_format_; }
   bool use_sync_query() const { return use_sync_query_; }
-  bool use_persistent_map_for_gpu_memory_buffers() const {
-    return use_persistent_map_for_gpu_memory_buffers_;
+  gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager() {
+    return gpu_memory_buffer_manager_;
   }
   size_t num_resources() const { return resources_.size(); }
 
@@ -427,15 +426,8 @@ class CC_EXPORT ResourceProvider
   // Indicates if we can currently lock this resource for write.
   bool CanLockForWrite(ResourceId id);
 
-  // Copy |rect| pixels from source to destination.
-  void CopyResource(ResourceId source_id,
-                    ResourceId dest_id,
-                    const gfx::Rect& rect);
-
   void WaitSyncPointIfNeeded(ResourceId id);
 
-  void WaitReadLockIfNeeded(ResourceId id);
-
   static GLint GetActiveTextureUnit(gpu::gles2::GLES2Interface* gl);
 
   OutputSurface* output_surface() { return output_surface_; }
@@ -458,7 +450,6 @@ class CC_EXPORT ResourceProvider
                    int highp_threshold_min,
                    bool use_rgba_4444_texture_format,
                    size_t id_allocation_chunk_size,
-                   bool use_persistent_map_for_gpu_memory_buffers,
                    const std::vector<unsigned>& use_image_texture_targets);
   void Initialize();
 
@@ -614,9 +605,6 @@ class CC_EXPORT ResourceProvider
   scoped_ptr<IdAllocator> buffer_id_allocator_;
 
   bool use_sync_query_;
-  bool use_persistent_map_for_gpu_memory_buffers_;
-  // Fence used for CopyResource if CHROMIUM_sync_query is not supported.
-  scoped_refptr<SynchronousFence> synchronous_fence_;
   std::vector<unsigned> use_image_texture_targets_;
 
   // A process-unique ID used for disambiguating memory dumps from different