This CL fixes issue 11480: Support GTK keyboard themes (emacs keybindings)....

chrome/browser/renderer_host/render_widget_host_view.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_
 
 #include "base/gfx/native_widget_types.h"
 #include "base/shared_memory.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "webkit/glue/webplugin.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 namespace IPC {
 class Message;
 }
 
 class BackingStore;
 class RenderProcessHost;
 class RenderWidgetHost;
 class WebCursor;
+class NativeWebKeyboardEvent;
 struct WebMenuItem;
 
 // RenderWidgetHostView is an interface implemented by an object that acts as
 // the "View" portion of a RenderWidgetHost. The RenderWidgetHost and its
 // associated RenderProcessHost own the "Model" in this case which is the
 // child renderer process. The View is responsible for receiving events from
 // the surrounding environment and passing them to the RenderWidgetHost, and
 // for actually displaying the content of the RenderWidgetHost when it
 // changes.
 class RenderWidgetHostView {
@@ skipping 126 matching lines @@
 #endif
 
 #if defined(OS_LINUX)
   virtual gfx::PluginWindowHandle CreatePluginContainer(
       base::ProcessId plugin_process_id) = 0;
   virtual void DestroyPluginContainer(gfx::PluginWindowHandle container) = 0;
 #endif
 
   virtual void PluginProcessCrashed(base::ProcessId pid) { }
 
+  // Called by RenderWidgetHost when a keyboard event was not processed by the
+  // renderer. Subclasses may override this method to handle the events, for
+  // example to match the events against system defined key bindings and
+  // translate them into edit commands.
+  // Returns true if the event is handled, otherwise returns false.
+  virtual bool UnhandledKeyboardEvent(const NativeWebKeyboardEvent& event) {
+    return false;
+  }
+
   void set_activatable(bool activatable) {
     activatable_ = activatable;
   }
   bool activatable() const { return activatable_; }
 
   // Subclasses should override this method to do whatever is appropriate to set
   // the custom background for their platform.
   virtual void SetBackground(const SkBitmap& background) {
     background_ = background;
   }
   const SkBitmap& background() const { return background_; }
 
  protected:
   // Interface class only, do not construct.
   RenderWidgetHostView() : activatable_(true) {}
 
   // Whether the window can be activated. Autocomplete popup windows for example
   // cannot be activated.  Default is true.
   bool activatable_;
 
   // A custom background to paint behind the web content. This will be tiled
   // horizontally. Can be null, in which case we fall back to painting white.
   SkBitmap background_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostView);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_H_