Add "Sign In" button to the account chooser on Mac.

chrome/browser/ui/cocoa/passwords/passwords_bubble_utils.h

 // Copyright 2015 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORDS_BUBBLE_UTILS_H_
 #define CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORDS_BUBBLE_UTILS_H_
 
 #include <string>
 
 #import <Cocoa/Cocoa.h>
@@ skipping 29 matching lines @@
 std::pair<CGFloat, CGFloat> GetResizedColumns(
     CGFloat maxWidth,
     std::pair<CGFloat, CGFloat> columnsWidth);
 
 // Returns a password text field initialized with |text|.
 NSSecureTextField* PasswordLabel(const base::string16& text);
 
 // Returns a button of the standard style for the bubble.
 NSButton* DialogButton(NSString* title);
 
+// Returns a NSRegularControlSize button. It's used for improving the contrast
+// due to Accessabilty standards.
+NSButton* BiggerDialogButton(NSString* title);
+
 // Returns a title label with |text| for a bubble. Nonempty |range| may specify
 // a link range.
 HyperlinkTextView* TitleBubbleLabelWithLink(const base::string16& text,
                                             gfx::Range range,
                                             id<NSTextViewDelegate> delegate);
 
 // Returns a title label with |text| for a dialog. Nonempty |range| may specify
 // a link range.
 HyperlinkTextView* TitleDialogLabelWithLink(const base::string16& text,
                                             gfx::Range range,
                                             id<NSTextViewDelegate> delegate);
 
 // Returns a label with |text| and small font. Nonempty |range| may specify a
 // link range.
 HyperlinkTextView* LabelWithLink(const base::string16& text,
                                  SkColor color,
                                  gfx::Range range,
                                  id<NSTextViewDelegate> delegate);
 
 #endif  // CHROME_BROWSER_UI_COCOA_PASSWORDS_PASSWORDS_BUBBLE_UTILS_H_