AcceleratorProvider: Make GetAcceleratorForCommandId const.

chrome/browser/ui/toolbar/app_menu_model_unittest.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.
 
 #include "chrome/browser/ui/toolbar/app_menu_model.h"
 
 #include "base/macros.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/defaults.h"
 #include "chrome/browser/prefs/browser_prefs.h"
@@ skipping 41 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(MenuError);
 };
 
 } // namespace
 
 class AppMenuModelTest : public BrowserWithTestWindowTest,
                          public ui::AcceleratorProvider {
  public:
   // Don't handle accelerators.
   bool GetAcceleratorForCommandId(int command_id,
-                                  ui::Accelerator* accelerator) override {
+                                  ui::Accelerator* accelerator) const override {
     return false;
   }
 
  protected:
   void SetUp() override {
     prefs_.reset(new TestingPrefServiceSimple());
     chrome::RegisterLocalState(prefs_->registry());
 
     TestingBrowserProcess::GetGlobal()->SetLocalState(prefs_.get());
     testing_io_thread_state_.reset(new chrome::TestingIOThreadState());
@@ skipping 133 matching lines @@
 
 class EncodingMenuModelTest : public BrowserWithTestWindowTest,
                               public MenuModelTest {
 };
 
 TEST_F(EncodingMenuModelTest, IsCommandIdCheckedWithNoTabs) {
   EncodingMenuModel model(browser());
   ASSERT_EQ(NULL, browser()->tab_strip_model()->GetActiveWebContents());
   EXPECT_FALSE(model.IsCommandIdChecked(IDC_ENCODING_WINDOWS1252));
 }