Revert of BackgroundGradientView: -drawBackground: → -drawRect:

chrome/browser/ui/cocoa/toolbar/toolbar_view_cocoa.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_cocoa.h"
 
 #import "chrome/browser/ui/cocoa/view_id_util.h"
 #import "ui/base/cocoa/nsview_additions.h"
 #include "ui/base/material_design/material_design_controller.h"
 
 @implementation ToolbarView
 
 @synthesize dividerOpacity = dividerOpacity_;
 
 // Prevent mouse down events from moving the parent window around.
 - (BOOL)mouseDownCanMoveWindow {
   return NO;
 }
 
+- (void)drawRect:(NSRect)dirtyRect {
+  [self drawBackground:dirtyRect];
+}
+
 // Override of |-[BackgroundGradientView strokeColor]|; make it respect opacity.
 - (NSColor*)strokeColor {
   // Only return a transparent color if not Material Design.
   if (!ui::MaterialDesignController::IsModeMaterial()) {
     return [[super strokeColor] colorWithAlphaComponent:[self dividerOpacity]];
   }
   return [super strokeColor];
 }
 
 - (BOOL)accessibilityIsIgnored {
@@ skipping 16 matching lines @@
 }
 
 // ThemedWindowDrawing overrides.
 
 - (void)windowDidChangeActive {
   // Need to redraw the omnibox and toolbar buttons as well.
   [self cr_recursivelySetNeedsDisplay:YES];
 }
 
 @end