Refactor themePatternPhase and tab_view in preparation for fixing crbug.com/176857

chrome/browser/ui/cocoa/chrome_browser_window.mm

 // Copyright (c) 2012 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/chrome_browser_window.h"
 
 #include "base/logging.h"
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #include "ui/base/theme_provider.h"
 
 @implementation ChromeBrowserWindow
 
 - (ui::ThemeProvider*)themeProvider {
   id delegate = [self delegate];
   if (![delegate respondsToSelector:@selector(themeProvider)])
     return NULL;
   return [delegate themeProvider];
 }
 
 - (ThemedWindowStyle)themedWindowStyle {
   id delegate = [self delegate];
   if (![delegate respondsToSelector:@selector(themedWindowStyle)])
     return THEMED_NORMAL;
   return [delegate themedWindowStyle];
 }
 
-- (NSPoint)themePatternPhase {
+- (NSPoint)themePatternPhaseForAlignment:(ThemePatternAlignment)alignment {
   id delegate = [self delegate];
-  if (![delegate respondsToSelector:@selector(themePatternPhase)])
+  if (![delegate respondsToSelector:@selector(themePatternPhaseForAlignment:)])
     return NSZeroPoint;
-  return [delegate themePatternPhase];
+  return [delegate themePatternPhaseForAlignment:alignment];
 }
 
 @end