Chromium plumbing for Device Orientation.

chrome/browser/renderer_host/resource_message_filter.h

Index: chrome/browser/renderer_host/resource_message_filter.h
diff --git a/chrome/browser/renderer_host/resource_message_filter.h b/chrome/browser/renderer_host/resource_message_filter.h
index 317f55e8a1a7c7370481a3720f4bbf2c8daaf499..19320e05cb4396f4965327f0fd78528c26911ad0 100644
--- a/chrome/browser/renderer_host/resource_message_filter.h
+++ b/chrome/browser/renderer_host/resource_message_filter.h
@@ -53,6 +53,10 @@ namespace base {
 class SharedMemory;
 }
 
+namespace device_orientation {
+class DispatcherHost;
+}
+
 namespace file_util {
 struct FileInfo;
 }
@@ -452,6 +456,10 @@ class ResourceMessageFilter : public IPC::ChannelProxy::MessageFilter,
   // Used to handle geolocation-related messages.
   scoped_refptr<GeolocationDispatcherHost> geolocation_dispatcher_host_;
 
+  // Used to handle device orientation related messages.
+  scoped_refptr<device_orientation::DispatcherHost>
+      device_orientation_dispatcher_host_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceMessageFilter);
 };