cc: Add asynchronous setPixel interface.

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 "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 191 matching lines @@
     void acquirePixelBuffer(ResourceId id);
     void releasePixelBuffer(ResourceId id);
 
     // Map/unmap the acquired pixel buffer.
     uint8_t* mapPixelBuffer(ResourceId id);
     void unmapPixelBuffer(ResourceId id);
 
     // Update pixels from acquired pixel buffer.
     void setPixelsFromBuffer(ResourceId id);
 
+    // Asynchronously update pixels from acquired pixel buffer.
+    void beginSetPixels(ResourceId id);

[piman, 2012/11/27 00:40:01]

naming nit: I would name this something like setPixelsFromBufferAsync. The
reason is that it does the same thing as setPixelsFromBuffer, but
asynchronously.

'begin' makes me look for an 'end'

+    bool didSetPixelsComplete(ResourceId id);
+    void abortSetPixels(ResourceId id);
+
 private:
     struct Resource {
         Resource();
         Resource(unsigned textureId, int pool, const gfx::Size& size, GLenum format);
         Resource(uint8_t* pixels, int pool, const gfx::Size& size, GLenum format);
 
         unsigned glId;
         // Pixel buffer used for set pixels without unnecessary copying.
         unsigned glPixelBufferId;
+        // Query used to determine when asynchronous set pixels complete.
+        unsigned glUploadQueryId;
         Mailbox mailbox;
         uint8_t* pixels;
         uint8_t* pixelBuffer;
         int pool;
         int lockForReadCount;
         bool lockedForWrite;
         bool external;
         bool exported;
         bool markedForDeletion;
         gfx::Size size;
@@ skipping 38 matching lines @@
     int m_maxTextureSize;
 
     base::ThreadChecker m_threadChecker;
 
     DISALLOW_COPY_AND_ASSIGN(ResourceProvider);
 };
 
 }
 
 #endif  // CC_RESOURCE_PROVIDER_H_