refactoring mouse lock to support pepper and WebKit

ppapi/examples/mouse_lock/mouse_lock.cc

 // Copyright (c) 2011 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.
 
 #include <cmath>
 #include <stdarg.h>
 #include <stdio.h>
 
 #include "ppapi/c/dev/ppb_console_dev.h"
 #include "ppapi/c/ppb_input_event.h"
@@ skipping 57 matching lines @@
       case PP_INPUTEVENT_TYPE_KEYDOWN: {
         pp::KeyboardInputEvent key_event(event);
         // Lock the mouse when the Enter key is pressed.
         if (key_event.GetKeyCode() == 13) {
           if (mouse_locked_) {
             UnlockMouse();
           } else {
             LockMouse(callback_factory_.NewRequiredCallback(
                 &MyInstance::DidLockMouse));
           }
+          return true;
         }
-        return true;
+        return false;
       }
       default:
         return false;
     }
   }
 
   virtual void DidChangeView(const pp::Rect& position, const pp::Rect& clip) {
     if (position.size().width() == width_ &&
         position.size().height() == height_)
       return;  // We don't care about the position, only the size.
@@ skipping 174 matching lines @@
 
 namespace pp {
 
 // Factory function for your specialization of the Module object.
 Module* CreateModule() {
   return new MyModule();
 }
 
 }  // namespace pp