content: Cleanup GpuMemoryBuffer allocation.

content/common/gpu/client/gpu_memory_buffer_impl_shm.h

Index: content/common/gpu/client/gpu_memory_buffer_impl_shm.h
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_shm.h b/content/common/gpu/client/gpu_memory_buffer_impl_shm.h
index 6e0856306bbfb96a5a034f96b37d4fb15fbfe8e2..e11a710241be088429743c6411695bd0f5bc3c72 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_shm.h
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_shm.h
@@ -9,15 +9,22 @@
 
 namespace content {
 
-// Provides implementation of a GPU memory buffer based
-// on a shared memory handle.
+// Implementation of GPU memory buffer based on shared memory.
 class GpuMemoryBufferImplShm : public GpuMemoryBufferImpl {
  public:
-  GpuMemoryBufferImplShm(gfx::Size size, unsigned internalformat);
+  GpuMemoryBufferImplShm(const gfx::Size& size, unsigned internalformat);
   virtual ~GpuMemoryBufferImplShm();
 
-  bool Initialize(gfx::GpuMemoryBufferHandle handle);
-  bool InitializeFromSharedMemory(scoped_ptr<base::SharedMemory> shared_memory);
+  // Allocates a shared memory backed GPU memory buffer with |size| and
+  // |internalformat| for use by |child_process|.
+  static void AllocateSharedMemoryForChildProcess(
+      const gfx::Size& size,
+      unsigned internalformat,
+      base::ProcessHandle child_process,
+      gfx::GpuMemoryBufferHandle* handle);
+
+  bool Initialize();
+  bool InitializeFromHandle(gfx::GpuMemoryBufferHandle handle);
 
   // Overridden from gfx::GpuMemoryBuffer:
   virtual void* Map(AccessMode mode) OVERRIDE;