[Mac] Remove the presentation mode button and its associated action from the tabstrip.

chrome/browser/ui/cocoa/browser_window_controller.h

Index: chrome/browser/ui/cocoa/browser_window_controller.h
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.h b/chrome/browser/ui/cocoa/browser_window_controller.h
index 0487b3b61f75918c8df3c4d4a46be8483a081ba0..dc966eb175d9fb00d2c5040542c9d40ceffa29f2 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.h
+++ b/chrome/browser/ui/cocoa/browser_window_controller.h
@@ -111,10 +111,6 @@ class WebContents;
   // unless it's appropriate to show it.
   scoped_nsobject<AvatarButtonController> avatarButtonController_;
 
-  // The view that shows the presentation mode toggle when in Lion fullscreen
-  // mode.  Nil if not in fullscreen mode or not on Lion.
-  scoped_nsobject<NSButton> presentationModeToggleButton_;
-
   // Lazily created view which draws the background for the floating set of bars
   // in presentation mode (for window types having a floating bar; it remains
   // nil for those which don't).
@@ -393,11 +389,6 @@ class WebContents;
 // Returns fullscreen state.  This method is safe to call on all OS versions.
 - (BOOL)isFullscreen;
 
-// Toggles presentation mode without exiting fullscreen mode.  Should only be
-// called by the presentation mode toggle button.  This method should not be
-// called on Snow Leopard or earlier.
-- (void)togglePresentationModeForLionOrLater:(id)sender;
-
 // Enters (or exits) presentation mode.  Also enters fullscreen mode if this
 // window is not already fullscreen.  This method is safe to call on all OS
 // versions.