[Mac] Window titles for Expose.

chrome/browser/cocoa/chrome_browser_window.mm

Index: chrome/browser/cocoa/chrome_browser_window.mm
diff --git a/chrome/browser/cocoa/browser_window.mm b/chrome/browser/cocoa/chrome_browser_window.mm
similarity index 86%
rename from chrome/browser/cocoa/browser_window.mm
rename to chrome/browser/cocoa/chrome_browser_window.mm
index 1ecce6590602e5d3ffb90f2da30c1ddd7a5db405..4f2f8594152c5b7d8f10da566cafa19ac26d314a 100644
--- a/chrome/browser/cocoa/browser_window.mm
+++ b/chrome/browser/cocoa/chrome_browser_window.mm
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#import "chrome/browser/cocoa/browser_window.h"
+#import "chrome/browser/cocoa/chrome_browser_window.h"
 
 #include "base/logging.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
@@ -35,4 +35,12 @@
   return [super performKeyEquivalent:event];
 }
 
+- (void)setShouldHideTitle:(BOOL)flag {
+  shouldHideTitle_ = flag;
+}
+
+-(BOOL)_isTitleHidden {
+  return shouldHideTitle_;
+}
+
 @end