content: Add command line flag for native GPU memory buffers.

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index 034b3f5a995b4b843ad9994968798486dd122840..aeb9fb830ed29f56d6c7e2309ab681d1002834f4 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -430,6 +430,16 @@ void BrowserMainLoop::EarlyInitialization() {
   }
 #endif  // !defined(OS_IOS)
 
+  if (parsed_command_line_.HasSwitch(switches::kEnableNativeGpuMemoryBuffers)) {
+    BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
+        gfx::GpuMemoryBuffer::MAP);
+  }
+
+#if defined(USE_OZONE)
+  BrowserGpuChannelHostFactory::EnableGpuMemoryBufferFactoryUsage(
+      gfx::GpuMemoryBuffer::SCANOUT);
+#endif
+
   if (parts_)
     parts_->PostEarlyInitialization();
 }