cc: Never block on uploads from previous frame and increase max pending uploads.

cc/UnthrottledTextureUploader.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 UnthrottledTextureUploader_h
 #define UnthrottledTextureUploader_h
 
 #include "base/basictypes.h"
 #include "CCResourceProvider.h"
 #include "TextureUploader.h"
 
 namespace cc {
 
 class UnthrottledTextureUploader : public TextureUploader {
 public:
     static PassOwnPtr<UnthrottledTextureUploader> create()
     {
         return adoptPtr(new UnthrottledTextureUploader());
     }
     virtual ~UnthrottledTextureUploader() { }
 
-    virtual size_t numPendingUploads() OVERRIDE;
+    virtual size_t numBlockingUploads() OVERRIDE;
+    virtual void markPendingUploadsAsNonBlocking() OVERRIDE;
     virtual double estimatedTexturesPerSecond() OVERRIDE;
     virtual void beginUploads() OVERRIDE { }
     virtual void endUploads() OVERRIDE { }
     virtual void uploadTexture(CCResourceProvider* resourceProvider, Parameters upload) OVERRIDE;
 
 protected:
     UnthrottledTextureUploader() { }
 
 private:
     DISALLOW_COPY_AND_ASSIGN(UnthrottledTextureUploader);
 };
 
 }
 
 #endif