Move remaining files in content\browser\renderer_host to content namespace.

content/browser/renderer_host/render_widget_host_view_gtk.h

Index: content/browser/renderer_host/render_widget_host_view_gtk.h
===================================================================
--- content/browser/renderer_host/render_widget_host_view_gtk.h	(revision 164665)
+++ content/browser/renderer_host/render_widget_host_view_gtk.h	(working copy)
@@ -27,13 +27,12 @@
 #include "webkit/glue/webcursor.h"
 #include "webkit/plugins/npapi/gtk_plugin_container_manager.h"
 
-class GtkKeyBindingsHandler;
-
 typedef struct _GtkClipboard GtkClipboard;
 typedef struct _GtkSelectionData GtkSelectionData;
 
 namespace content {
 class GtkIMContextWrapper;
+class GtkKeyBindingsHandler;
 class RenderWidgetHost;
 class RenderWidgetHostImpl;
 struct NativeWebKeyboardEvent;