Add support for compressed GPU memory buffers.

ui/gfx/gpu_memory_buffer.h

 // Copyright 2013 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 UI_GFX_GPU_MEMORY_BUFFER_H_
 #define UI_GFX_GPU_MEMORY_BUFFER_H_
 
 #include "base/memory/shared_memory.h"
 #include "build/build_config.h"
 #include "ui/gfx/gfx_export.h"
@@ skipping 24 matching lines @@
 #endif
 };
 
 // This interface typically correspond to a type of shared memory that is also
 // shared with the GPU. A GPU memory buffer can be written to directly by
 // regular CPU code, but can also be read by the GPU.
 class GFX_EXPORT GpuMemoryBuffer {
  public:
   // The format needs to be taken into account when mapping a buffer into the
   // client's address space.
-  enum Format { RGBA_8888, RGBX_8888, BGRA_8888, FORMAT_LAST = BGRA_8888 };
+  enum Format {
+    ATC,
+    ATCIA,
+    DXT1,
+    DXT5,
+    ETC1,
+    RGBA_8888,
+    RGBX_8888,
+    BGRA_8888,
+
+    FORMAT_LAST = BGRA_8888
+  };
 
   // The usage mode affects how a buffer can be used. Only buffers created with
   // MAP can be mapped into the client's address space and accessed by the CPU.
   enum Usage { MAP, SCANOUT, USAGE_LAST = SCANOUT };
 
   virtual ~GpuMemoryBuffer() {}
 
   // Maps the buffer into the client's address space so it can be written to by
   // the CPU. This call may block, for instance if the GPU needs to finish
   // accessing the buffer or if CPU caches need to be synchronized. Returns NULL
@@ skipping 16 matching lines @@
   // Returns a platform specific handle for this buffer.
   virtual GpuMemoryBufferHandle GetHandle() const = 0;
 
   // Type-checking downcast routine.
   virtual ClientBuffer AsClientBuffer() = 0;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GPU_MEMORY_BUFFER_H_