Don't draw a window title on browser windows.

chrome/browser/ui/cocoa/framed_browser_window_unittest.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 <Cocoa/Cocoa.h>
 
 #include "base/debug/debugger.h"
+#include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/ui/cocoa/framed_browser_window.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #import "testing/gtest_mac.h"
 #include "testing/platform_test.h"
 #import "third_party/ocmock/OCMock/OCMock.h"
 
@@ skipping 45 matching lines @@
 
   FramedBrowserWindow* window_;
 };
 
 // Baseline test that the window creates, displays, closes, and
 // releases.
 TEST_F(FramedBrowserWindowTest, ShowAndClose) {
   [window_ display];
 }
 
-// Test that undocumented title-hiding API we're using does the job.
+// Test that the title-hiding API we're using does the job.
 TEST_F(FramedBrowserWindowTest, DoesHideTitle) {
   // The -display calls are not strictly necessary, but they do
   // make it easier to see what's happening when debugging (without
   // them the changes are never flushed to the screen).
 
   [window_ setTitle:@""];
   [window_ display];
   NSData* emptyTitleData = WindowContentsAsTIFF();
 
   [window_ setTitle:@"This is a title"];
   [window_ display];
   NSData* thisTitleData = WindowContentsAsTIFF();
 
   // The default window with a title should look different from the
   // window with an empty title.
   EXPECT_FALSE([emptyTitleData isEqualToData:thisTitleData]);
 
   [window_ setShouldHideTitle:YES];
   [window_ setTitle:@""];
   [window_ display];
   [window_ setTitle:@"This is a title"];
   [window_ display];
   NSData* hiddenTitleData = WindowContentsAsTIFF();
 
   // With our magic setting, the window with a title should look the
   // same as the window with an empty title.
-  EXPECT_TRUE([window_ _isTitleHidden]);
   EXPECT_TRUE([emptyTitleData isEqualToData:hiddenTitleData]);
+
+  // Test the secret API only on versions of the system in which it exists.
+  if (base::mac::IsOSMavericksOrEarlier())
+    EXPECT_TRUE([window_ _isTitleHidden]);
 }
 
 // Test to make sure that our window widgets are in the right place.
 TEST_F(FramedBrowserWindowTest, WindowWidgetLocation) {
   BOOL yes = YES;
   BOOL no = NO;
 
   // First without a tabstrip.
   [window_ close];
   window_ = [[FramedBrowserWindow alloc]
@@ skipping 58 matching lines @@
   miniaturizeControl = [window_ standardWindowButton:NSWindowMiniaturizeButton];
   EXPECT_TRUE(miniaturizeControl);
   miniaturizeFrame = [miniaturizeControl frame];
   EXPECT_EQ(NSMaxY(miniaturizeFrame),
             NSMaxY(windowBounds) -
                 kFramedWindowButtonsWithTabStripOffsetFromTop);
   EXPECT_EQ(NSMinX(miniaturizeFrame),
             NSMaxX(closeBoxFrame) + [window_ windowButtonsInterButtonSpacing]);
   [window_ setWindowController:nil];
 }