content: Move type selection logic out of GpuMemoryBufferImpl.

content/common/gpu/gpu_memory_buffer_factory.h

 // Copyright 2014 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_GPU_MEMORY_BUFFER_FACTORY_H_
 #define CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
+#include "content/common/content_export.h"
 #include "ui/gfx/geometry/size.h"
 #include "ui/gfx/gpu_memory_buffer.h"
 
 namespace gfx {
 class GLImage;
 }
 
 namespace gpu {
 class ImageFactory;
 }
 
 namespace content {
 
-class GpuMemoryBufferFactory {
+class CONTENT_EXPORT GpuMemoryBufferFactory {
  public:
   GpuMemoryBufferFactory() {}
   virtual ~GpuMemoryBufferFactory() {}
 
   // Creates a new platform specific factory instance.
   static scoped_ptr<GpuMemoryBufferFactory> Create();
 
   // Creates a GPU memory buffer instance of |type|. A valid handle is
   // returned on success.
   virtual gfx::GpuMemoryBufferHandle CreateGpuMemoryBuffer(
@@ skipping 12 matching lines @@
   // Type-checking downcast routine.
   virtual gpu::ImageFactory* AsImageFactory() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferFactory);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_MEMORY_BUFFER_FACTORY_H_