mac: Add traffic lights to fullscreen mode in Yosemite.

chrome/browser/ui/cocoa/tabs/tab_strip_controller.h

Index: chrome/browser/ui/cocoa/tabs/tab_strip_controller.h
diff --git a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.h b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.h
index 6acd5669e3fef2d4c75a0f7f47a3957efaa9a8fd..fa1d28e830d097b34ccae90784bf75fcbe7c66b1 100644
--- a/chrome/browser/ui/cocoa/tabs/tab_strip_controller.h
+++ b/chrome/browser/ui/cocoa/tabs/tab_strip_controller.h
@@ -139,6 +139,10 @@ class WebContents;
 
   // Helper for performing tab selection as a result of dragging over a tab.
   scoped_ptr<HoverTabSelector> hoverTabSelector_;
+
+  // A container view for the window controls, which must be manually added in
+  // fullscreen in 10.10+.
+  base::scoped_nsobject<NSView> fullscreenWindowControls_;
 }
 
 @property(nonatomic) CGFloat leftIndentForControls;
@@ -248,6 +252,12 @@ class WebContents;
 // Returns the currently active TabContentsController.
 - (TabContentsController*)activeTabContentsController;
 
+// Adds traffic lights to the tab strip. Idempotent.
+- (void)addWindowControls;
+
+// Removes traffic lights from the tab strip. Idempotent.
+- (void)removeWindowControls;
+
 @end
 
 @interface TabStripController(TestingAPI)