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

chrome/browser/ui/cocoa/toolbar/toolbar_view.mm

 // Copyright (c) 2011 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/toolbar/toolbar_view.h"
 
 #import "chrome/browser/ui/cocoa/themed_window.h"
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #import "ui/base/cocoa/nsgraphics_context_additions.h"
 
 @implementation ToolbarView
 
 @synthesize dividerOpacity = dividerOpacity_;
 
 // Prevent mouse down events from moving the parent window around.
 - (BOOL)mouseDownCanMoveWindow {
   return NO;
 }
 
 - (void)drawRect:(NSRect)rect {
-  // The toolbar's background pattern is phased relative to the
-  // tab strip view's background pattern.
-  NSPoint phase = [[self window] themePatternPhase];
+  NSPoint phase = [[self window]
+      themePatternPhaseForAlignment:THEME_PATTERN_ALIGN_WITH_TAB_STRIP];
   [[NSGraphicsContext currentContext] cr_setPatternPhase:phase forView:self];
   [self drawBackgroundWithOpaque:YES];
 }
 
 // Override of |-[BackgroundGradientView strokeColor]|; make it respect opacity.
 - (NSColor*)strokeColor {
   return [[super strokeColor] colorWithAlphaComponent:[self dividerOpacity]];
 }
 
 - (BOOL)accessibilityIsIgnored {
   return NO;
 }
 
 - (id)accessibilityAttributeValue:(NSString*)attribute {
   if ([attribute isEqual:NSAccessibilityRoleAttribute])
     return NSAccessibilityToolbarRole;
 
   return [super accessibilityAttributeValue:attribute];
 }
 
 - (ViewID)viewID {
   return VIEW_ID_TOOLBAR;
 }
 
 - (BOOL)isOpaque {
   return YES;
 }
 
 @end