cc: refcount resources as we send them to the parent

cc/resources/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_RESOURCES_RESOURCE_PROVIDER_H_
 #define CC_RESOURCES_RESOURCE_PROVIDER_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 336 matching lines @@
 
     unsigned gl_id;
     // Pixel buffer used for set pixels without unnecessary copying.
     unsigned gl_pixel_buffer_id;
     // Query used to determine when asynchronous set pixels complete.
     unsigned gl_upload_query_id;
     TextureMailbox mailbox;
     uint8_t* pixels;
     uint8_t* pixel_buffer;
     int lock_for_read_count;
+    int imported_count;
+    int exported_count;
     bool locked_for_write;
     bool external;
-    bool exported;
     bool marked_for_deletion;
     bool pending_set_pixels;
     bool set_pixels_completion_forced;
     bool allocated;
     bool enable_read_lock_fences;
     scoped_refptr<Fence> read_lock_fence;
     gfx::Size size;
     GLenum format;
     // TODO(skyostil): Use a separate sampler object for filter state.
     GLenum filter;
@@ skipping 22 matching lines @@
 
   void CleanUpGLIfNeeded();
 
   const Resource* LockForRead(ResourceId id);
   void UnlockForRead(ResourceId id);
   const Resource* LockForWrite(ResourceId id);
   void UnlockForWrite(ResourceId id);
   static void PopulateSkBitmapWithResource(SkBitmap* sk_bitmap,
                                            const Resource* resource);
 
-  bool TransferResource(WebKit::WebGraphicsContext3D* context,
+  void TransferResource(WebKit::WebGraphicsContext3D* context,
                         ResourceId id,
                         TransferableResource* resource);
   enum DeleteStyle {
     Normal,
     ForShutdown,
   };
   void DeleteResourceInternal(ResourceMap::iterator it, DeleteStyle style);
   void LazyCreate(Resource* resource);
   void LazyAllocate(Resource* resource);
 
@@ skipping 29 matching lines @@
   base::ThreadChecker thread_checker_;
 
   scoped_refptr<Fence> current_read_lock_fence_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RESOURCE_PROVIDER_H_