Move NativeWebKeyboardEvent to the content namespace.

content/browser/renderer_host/gtk_key_bindings_handler.h

Index: content/browser/renderer_host/gtk_key_bindings_handler.h
===================================================================
--- content/browser/renderer_host/gtk_key_bindings_handler.h	(revision 137859)
+++ content/browser/renderer_host/gtk_key_bindings_handler.h	(working copy)
@@ -14,7 +14,9 @@
 #include "content/common/content_export.h"
 #include "ui/base/gtk/owned_widget_gtk.h"
 
+namespace content {
 struct NativeWebKeyboardEvent;
+}
 
 // This class is a convenience class for handling editor key bindings defined
 // in gtk keyboard theme.
@@ -43,7 +45,8 @@
   // Matches a key event against predefined gtk key bindings, false will be
   // returned if the key event doesn't correspond to a predefined key binding.
   // Edit commands matched with |wke| will be stored in |edit_commands|.
-  bool Match(const NativeWebKeyboardEvent& wke, EditCommands* edit_commands);
+  bool Match(const content::NativeWebKeyboardEvent& wke,
+             EditCommands* edit_commands);
 
  private:
   // Object structure of Handler class, which is derived from GtkTextView.