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

chrome/browser/ui/cocoa/browser_window_controller.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 "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 
 #include "base/command_line.h"
@@ skipping 1982 matching lines @@
   fullscreenBubbleType_ = bubbleType;
   [self showFullscreenExitBubbleIfNecessary];
 }
 
 - (BOOL)isFullscreen {
   return (fullscreenWindow_.get() != nil) ||
          ([[self window] styleMask] & NSFullScreenWindowMask) ||
          enteringFullscreen_;
 }
 
-- (void)togglePresentationModeForLionOrLater:(id)sender {
-  // Called only by the presentation mode toggle button.
-  DCHECK(base::mac::IsOSLionOrLater());
-  enteredPresentationModeFromFullscreen_ = YES;
-  chrome::ExecuteCommand(browser_.get(), IDC_PRESENTATION_MODE);
-}
-
 // On Lion, this function is called by either the presentation mode toggle
 // button or the "Enter Presentation Mode" menu item.  In the latter case, this
 // function also triggers the Lion machinery to enter fullscreen mode as well as
 // set presentation mode.  On Snow Leopard, this function is called by the
 // "Enter Presentation Mode" menu item, and triggering presentation mode always
 // moves the user into fullscreen mode.
 - (void)setPresentationMode:(BOOL)presentationMode
                         url:(const GURL&)url
                  bubbleType:(FullscreenExitBubbleType)bubbleType {
   fullscreenUrl_ = url;
@@ skipping 197 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isTabbedWindow {
   return browser_->is_type_tabbed();
 }
 
 @end  // @implementation BrowserWindowController(WindowType)