[Mac] Remove BrowserCommandExecutor protocol.

chrome/browser/ui/cocoa/apps/native_app_window_cocoa.mm

 // Copyright 2013 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.
 
 #include "chrome/browser/ui/cocoa/apps/native_app_window_cocoa.h"
 
 #include "base/command_line.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 145 matching lines @@
   return NO;  // See top of file NOTE: Maximize and Zoom.
 }
 
 // Allow non resizable windows (without NSResizableWindowMask) to enter
 // fullscreen by passing through the full size in willUseFullScreenContentSize.
 - (NSSize)window:(NSWindow *)window
     willUseFullScreenContentSize:(NSSize)proposedSize {
   return proposedSize;
 }
 
-- (void)executeCommand:(int)command {
-  // No-op, swallow the event.
-}
-
 - (BOOL)handledByExtensionCommand:(NSEvent*)event
     priority:(ui::AcceleratorManager::HandlerPriority)priority {
   if (appWindow_)
     return appWindow_->HandledByExtensionCommand(event, priority);
   return NO;
 }
 
 @end
 
 @interface AppNSWindow : ChromeEventProcessingWindow
@@ skipping 700 matching lines @@
 }
 
 void NativeAppWindowCocoa::UpdateRestoredBounds() {
   if (IsRestored(*this))
     restored_bounds_ = [window() frame];
 }
 
 void NativeAppWindowCocoa::HideWithoutMarkingHidden() {
   [window() orderOut:window_controller_];
 }