Don't draw a window title on browser windows.

base/mac/sdk_forward_declarations.h

Index: base/mac/sdk_forward_declarations.h
diff --git a/base/mac/sdk_forward_declarations.h b/base/mac/sdk_forward_declarations.h
index 1148e3673f002eaf5482a6135a41b8819ab80032..7ee82b2f12f013917f2372f9a18c1b2ab82a4914 100644
--- a/base/mac/sdk_forward_declarations.h
+++ b/base/mac/sdk_forward_declarations.h
@@ -240,4 +240,23 @@ typedef NSUInteger NSWindowOcclusionState;
 
 #endif  // MAC_OS_X_VERSION_10_9
 
+
+#if !defined(MAC_OS_X_VERSION_10_10) || \
+    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_10
+
+enum {
+  NSWindowTitleVisible  = 0,
+  NSWindowTitleHidden = 1,
+  NSWindowTitleHiddenWhenActive = 2,
+};
+typedef NSInteger NSWindowTitleVisibility;
+
+@interface NSWindow (YosemiteSDK)
+
+@property NSWindowTitleVisibility titleVisibility;
+
+@end
+
+#endif  // MAC_OS_X_VERSION_10_10
+
 #endif  // BASE_MAC_SDK_FORWARD_DECLARATIONS_H_