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

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

Index: chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller.mm
diff --git a/chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller.mm b/chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller.mm
index 6fdf43cf7b2b5eb0615378670aaad6c4aed44737..1046b2d406da23c8858dbd699fd5557cc2c5635d 100644
--- a/chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller.mm
+++ b/chrome/browser/ui/cocoa/passwords/autosignin_prompt_view_controller.mm
@@ -17,24 +17,6 @@
 #include "ui/base/cocoa/controls/hyperlink_text_view.h"
 #include "ui/base/l10n/l10n_util.h"
 
-namespace {
-
-// Returns a NSRegularControlSize button. It's used for improving the contrast
-// due to Accessabilty standards.
-NSButton* BiggerDialogButton(NSString* title) {
-  base::scoped_nsobject<NSButton> button(
-      [[NSButton alloc] initWithFrame:NSZeroRect]);
-  CGFloat fontSize = [NSFont systemFontSizeForControlSize:NSRegularControlSize];
-  [button setFont:[NSFont systemFontOfSize:fontSize]];
-  [button setTitle:title];
-  [button setBezelStyle:NSRoundedBezelStyle];
-  [[button cell] setControlSize:NSRegularControlSize];
-  [button sizeToFit];
-  return button.autorelease();
-}
-
-}  // namespace
-
 @interface AutoSigninPromptView : NSView
 @property (nonatomic, copy) BOOL (^escHandler)(NSEvent* theEvent);
 @end