Add PERSISTENT_MAP usage for GpuMemoryBuffers.

content/browser/gpu/browser_gpu_channel_host_factory.h

Index: content/browser/gpu/browser_gpu_channel_host_factory.h
diff --git a/content/browser/gpu/browser_gpu_channel_host_factory.h b/content/browser/gpu/browser_gpu_channel_host_factory.h
index b4df563fc02b9796cc163fd743350336cd784967..ec075b2e5cc5b5c0e17c8fe803c34cdccd069888 100644
--- a/content/browser/gpu/browser_gpu_channel_host_factory.h
+++ b/content/browser/gpu/browser_gpu_channel_host_factory.h
@@ -29,7 +29,8 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
       gfx::GpuMemoryBuffer::Usage usage);
   static bool IsGpuMemoryBufferFactoryUsageEnabled(
       gfx::GpuMemoryBuffer::Usage usage);
-  static uint32 GetImageTextureTarget();
+  static uint32 GetImageTextureTarget(gfx::GpuMemoryBuffer::Format format,
+                                      gfx::GpuMemoryBuffer::Usage usage);
 
   // Overridden from GpuChannelHostFactory:
   bool IsMainThread() override;
@@ -76,6 +77,10 @@ class CONTENT_EXPORT BrowserGpuChannelHostFactory
   BrowserGpuChannelHostFactory();
   ~BrowserGpuChannelHostFactory() override;
 
+  static bool IsGpuMemoryBufferConfigurationSupportedInternal(

[reveman, 2015/05/20 14:26:08]

If you can move this to the anonymous namespace of the cc file then that would
be preferred.

Either way, IsGpuMemoryBufferFactoryConfigurationSupported is preferred over the
"Internal" suffix as that's a more accurate description.

+      gfx::GpuMemoryBuffer::Format format,
+      gfx::GpuMemoryBuffer::Usage usage);
+
   void GpuChannelEstablished();
   void CreateViewCommandBufferOnIO(
       CreateRequest* request,