Support dynamic switching between integrated and discrete GPUs on Mac OS X.

content/plugin/webplugin_proxy.cc

Index: content/plugin/webplugin_proxy.cc
===================================================================
--- content/plugin/webplugin_proxy.cc	(revision 105158)
+++ content/plugin/webplugin_proxy.cc	(working copy)
@@ -672,9 +672,11 @@
   Send(new PluginHostMsg_BindFakePluginWindowHandle(route_id_, opaque));
 }
 
-WebPluginAcceleratedSurface* WebPluginProxy::GetAcceleratedSurface() {
+WebPluginAcceleratedSurface* WebPluginProxy::GetAcceleratedSurface(
+    gfx::GpuPreference gpu_preference) {
   if (!accelerated_surface_.get())
-    accelerated_surface_.reset(new WebPluginAcceleratedSurfaceProxy(this));
+    accelerated_surface_.reset(new WebPluginAcceleratedSurfaceProxy(
+        this, gpu_preference));
   return accelerated_surface_.get();
 }