Enable sync allocation of GpuMemoryBuffers from the browser process.

content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h

Index: content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h
index ab4cc56a184b47d1899e3f588f9420d2b5437ec0..644cce4347f8b4c44c309fbb3584581cfd4e4465 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_buffer.h
@@ -25,6 +25,13 @@ class GpuMemoryBufferImplOzoneNativeBuffer : public GpuMemoryBufferImpl {
       int child_id,
       const AllocationCallback& callback);
 
+  // Allocates an Ozone native buffer backed GPU memory buffer with |size| and
+  // |internalformat| with usage |usage| for use by the browser.
+  static gfx::GpuMemoryBufferHandle AllocateOzoneNativeBufferForBrowser(
+      const gfx::Size& size,
+      unsigned internalformat,
+      unsigned usage);

[reveman, 2014/09/04 19:43:31]

The current convention for doing this is to add an Initialize() member function
as the use of an gfx::GpuMemoryBufferHandle should not have to be exposed. See
GpuMemoryBufferImplSharedMemory.

[alexst (slow to review), 2014/09/04 21:14:47]

Done.

+
   static bool IsFormatSupported(unsigned internalformat);
   static bool IsUsageSupported(unsigned usage);
   static bool IsConfigurationSupported(unsigned internalformat, unsigned usage);