Move a bunch of code in content\renderer to the content namespace.

content/renderer/device_orientation_dispatcher.h

Index: content/renderer/device_orientation_dispatcher.h
===================================================================
--- content/renderer/device_orientation_dispatcher.h	(revision 163045)
+++ content/renderer/device_orientation_dispatcher.h	(working copy)
@@ -11,11 +11,12 @@
 #include "base/memory/scoped_ptr.h"
 #include "content/public/renderer/render_view_observer.h"
 
+struct DeviceOrientationMsg_Updated_Params;
+
+namespace content {
 class RenderViewImpl;
 
-struct DeviceOrientationMsg_Updated_Params;
-
-class DeviceOrientationDispatcher : public content::RenderViewObserver,
+class DeviceOrientationDispatcher : public RenderViewObserver,
                                     public WebKit::WebDeviceOrientationClient {
  public:
   explicit DeviceOrientationDispatcher(RenderViewImpl* render_view);
@@ -40,4 +41,6 @@
   bool started_;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_RENDERER_DEVICE_ORIENTATION_DISPATCHER_H_