gpu: Reduce of BrowserGpuChannelHostFactory.

content/browser/browser_main_loop.h

Index: content/browser/browser_main_loop.h
diff --git a/content/browser/browser_main_loop.h b/content/browser/browser_main_loop.h
index f771cf9bf5877a862f06c3caf49f6778a190f893..7b72970f771eff2f6f006c3c50a46858880dc1ff 100644
--- a/content/browser/browser_main_loop.h
+++ b/content/browser/browser_main_loop.h
@@ -43,6 +43,10 @@ namespace discardable_memory {
 class DiscardableSharedMemoryManager;
 }
 
+namespace gpu {
+class GpuChannelEstablishFactory;
+}
+
 namespace media {
 class AudioManager;
 class AudioSystem;
@@ -170,6 +174,8 @@ class CONTENT_EXPORT BrowserMainLoop {
     return startup_trace_file_;
   }
 
+  gpu::GpuChannelEstablishFactory* gpu_channel_establish_factory() const;
+
 #if defined(OS_ANDROID)
   void SynchronouslyFlushStartupTasks();
 #endif  // OS_ANDROID