NaCl SDK: Remove some unused variables in input_event.cc example

native_client_sdk/src/examples/api/input_event/input_event.cc

 // Copyright (c) 2012 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.
 
 // C headers
 #include <stdio.h>
 
 // C++ headers
 #include <sstream>
 #include <string>
 
 // PPAPI headers
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/cpp/input_event.h"
 #include "ppapi/cpp/instance.h"
 #include "ppapi/cpp/module.h"
 #include "ppapi/cpp/point.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/utility/completion_callback_factory.h"
 
 #ifdef PostMessage
 #undef PostMessage
 #endif
 
 namespace {
 
-const char* const kDidChangeFocus = "DidChangeFocus";
-const char* const kHaveFocus = "HaveFocus";
-const char* const kDontHaveFocus = "DontHaveFocus";
-
 std::string ModifierToString(uint32_t modifier) {
   std::string s;
   if (modifier & PP_INPUTEVENT_MODIFIER_SHIFTKEY) {
     s += "shift ";
   }
   if (modifier & PP_INPUTEVENT_MODIFIER_CONTROLKEY) {
     s += "ctrl ";
   }
   if (modifier & PP_INPUTEVENT_MODIFIER_ALTKEY) {
     s += "alt ";
@@ skipping 208 matching lines @@
   virtual ~InputEventModule() {}
 
   virtual pp::Instance* CreateInstance(PP_Instance instance) {
     return new InputEventInstance(instance);
   }
 };
 
 namespace pp {
 Module* CreateModule() { return new InputEventModule(); }
 }