Address post-commit comments from codereview.chromium.org/371059 and codereview.chromium.org/293019

chrome/browser/cocoa/chrome_browser_window.mm

 // Copyright (c) 2009 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/cocoa/chrome_browser_window.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
 #import "chrome/browser/cocoa/browser_frame_view.h"
 #import "chrome/browser/cocoa/tab_strip_controller.h"
@@ skipping 243 matching lines @@
 - (void)becomeMainWindow {
   [self windowMainStatusChanged];
   [super becomeMainWindow];
 }
 
 - (void)resignMainWindow {
   [self windowMainStatusChanged];
   [super resignMainWindow];
 }
 
+// Called after the current theme has changed.
 - (void)themeDidChangeNotification:(NSNotification*)aNotification {
   GTMTheme* theme = [aNotification object];
   if ([theme isEqual:[self gtm_theme]]) {
     [[self frameView] setNeedsDisplay:YES];
   }
 }
 
 - (void)systemThemeDidChangeNotification:(NSNotification*)aNotification {
   [closeButton_ setNeedsDisplay];
   [zoomButton_ setNeedsDisplay];
@@ skipping 48 matching lines @@
 
 - (void)setShouldHideTitle:(BOOL)flag {
   shouldHideTitle_ = flag;
 }
 
 -(BOOL)_isTitleHidden {
   return shouldHideTitle_;
 }
 
 @end