Revert of BackgroundGradientView: -drawBackground: → -drawRect:

chrome/browser/ui/cocoa/background_gradient_view_unittest.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 <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/background_gradient_view.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
+// Since BackgroundGradientView doesn't do any drawing by default, we
+// create a subclass to call its draw method for us.
+@interface BackgroundGradientSubClassTest : BackgroundGradientView
+@end
+
+@implementation BackgroundGradientSubClassTest
+
+- (void)drawRect:(NSRect)dirtyRect {
+  [self drawBackground:dirtyRect];
+}
+
+@end
+
 namespace {
 
 class BackgroundGradientViewTest : public CocoaTest {
  public:
   BackgroundGradientViewTest() {
     NSRect frame = NSMakeRect(0, 0, 100, 30);
-    base::scoped_nsobject<BackgroundGradientView> view(
-        [[BackgroundGradientView alloc] initWithFrame:frame]);
+    base::scoped_nsobject<BackgroundGradientSubClassTest> view(
+        [[BackgroundGradientSubClassTest alloc] initWithFrame:frame]);
     view_ = view.get();
     [[test_window() contentView] addSubview:view_];
   }
 
-  BackgroundGradientView* view_;
+  BackgroundGradientSubClassTest* view_;
 };
 
 TEST_VIEW(BackgroundGradientViewTest, view_)
 
 // Test drawing, mostly to ensure nothing leaks or crashes.
 TEST_F(BackgroundGradientViewTest, DisplayWithDivider) {
   [view_ setShowsDivider:YES];
   [view_ display];
 }
 
 }  // namespace