Change 'const' -> 'constexpr' in cocoa/passwords.

chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller_unittest.mm

 // Copyright 2016 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.
 
 #import "chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.h"
 
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/utf_string_conversions.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller.h"
 #include "chrome/browser/ui/passwords/password_dialog_controller.h"
 #include "components/autofill/core/common/password_form.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 
 namespace {
 
-const char kDialogTitle[] = "Auto signin";
-const char kDialogText[] = "bla bla";
+constexpr char kDialogTitle[] = "Auto signin";
+constexpr char kDialogText[] = "bla bla";
 
 class PasswordDialogControllerMock : public PasswordDialogController {
  public:
   MOCK_CONST_METHOD0(GetLocalForms, const FormsVector&());
   MOCK_CONST_METHOD0(GetFederationsForms, const FormsVector&());
   MOCK_CONST_METHOD0(GetAccoutChooserTitle,
                      std::pair<base::string16, gfx::Range>());
   MOCK_CONST_METHOD0(GetAutoSigninPromoTitle, base::string16());
   MOCK_CONST_METHOD0(GetAutoSigninText,
                      std::pair<base::string16, gfx::Range>());
@@ skipping 83 matching lines @@
   // A user may press mouse down, some navigation closes the dialog, mouse up
   // still sends the action. The view should not crash.
   SetUpAutosigninFirstRun();
   [view_controller() setBridge:nil];
   [view_controller().contentText clickedOnLink:@"" atIndex:0];
   [view_controller().okButton performClick:nil];
   [view_controller().turnOffButton performClick:nil];
 }
 
 }  // namespace