Add Async API unittests to readback format.

content/common/gpu/client/gl_helper.h

 // Copyright (c) 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 CONTENT_COMMON_GPU_CLIENT_GL_HELPER_H_
 #define CONTENT_COMMON_GPU_CLIENT_GL_HELPER_H_
 
 #include "base/atomicops.h"
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ skipping 196 matching lines @@
   // Copies the texture data out of |texture| into |out|.  |size| is the
   // size of the texture.  No post processing is applied to the pixels.  The
   // texture is assumed to have a format of GL_RGBA with a pixel type of
   // GL_UNSIGNED_BYTE.  This is a blocking call that calls glReadPixels on the
   // current OpenGL context.
   void ReadbackTextureSync(GLuint texture,
                            const gfx::Rect& src_rect,
                            unsigned char* out,
                            SkBitmap::Config format);
 
+  void ReadbackTextureAsync(GLuint texture,
+                            const gfx::Size& dst_size,
+                            unsigned char* out,
+                            SkBitmap::Config config,
+                            const base::Callback<void(bool)>& callback);
+
   // Creates a copy of the specified texture. |size| is the size of the texture.
   // Note that the src_texture will have the min/mag filter set to GL_LINEAR
   // and wrap_s/t set to CLAMP_TO_EDGE in this call.
   GLuint CopyTexture(GLuint texture, const gfx::Size& size);
 
   // Creates a scaled copy of the specified texture. |src_size| is the size of
   // the texture and |dst_size| is the size of the resulting copy.
   // Note that the src_texture will have the min/mag filter set to GL_LINEAR
   // and wrap_s/t set to CLAMP_TO_EDGE in this call.
   GLuint CopyAndScaleTexture(GLuint texture,
@@ skipping 128 matching lines @@
   virtual void ReadbackYUV(const gpu::Mailbox& mailbox,
                            uint32 sync_point,
                            const scoped_refptr<media::VideoFrame>& target,
                            const base::Callback<void(bool)>& callback) = 0;
   virtual GLHelper::ScalerInterface* scaler() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GL_HELPER_H_