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

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

 // Copyright 2014 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 <algorithm>
 
 #import "chrome/browser/ui/cocoa/passwords/pending_password_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/browser/ui/chrome_style.h"
 #import "chrome/browser/ui/cocoa/hover_close_button.h"
 #import "chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h"
 #include "chrome/browser/ui/passwords/manage_passwords_bubble_model.h"
 #include "chrome/grit/generated_resources.h"
 #include "skia/ext/skia_utils_mac.h"
 #import "third_party/google_toolbox_for_mac/src/AppKit/GTMUILocalizerAndLayoutTweaker.h"
 #import "ui/base/cocoa/controls/hyperlink_text_view.h"
 #include "ui/base/l10n/l10n_util.h"
 
-const SkColor kWarmWelcomeColor = SkColorSetRGB(0x64, 0x64, 0x64);
+constexpr SkColor kWarmWelcomeColor =
+    SkColorSetARGBMacro(0xFF, 0x64, 0x64, 0x64);
 
 @implementation PendingPasswordViewController
 
 - (BOOL)textView:(NSTextView*)textView
     clickedOnLink:(id)link
           atIndex:(NSUInteger)charIndex {
   ManagePasswordsBubbleModel* model = [self model];
   if (model)
     model->OnBrandLinkClicked();
   [self.delegate viewShouldDismiss];
@@ skipping 147 matching lines @@
 
 @end
 
 @implementation PendingPasswordViewController (Testing)
 
 - (NSButton*)closeButton {
   return closeButton_.get();
 }
 
 @end