[Mac]Implement ViewID support.

chrome/browser/cocoa/browser_window_controller.mm

 // Copyright (c) 2010 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/cocoa/browser_window_controller.h"
 
 #include <Carbon/Carbon.h>
 
 #include "app/l10n_util_mac.h"
 #include "base/mac_util.h"
@@ skipping 900 matching lines @@
   // belong to a background window, yet this controller gets it because it is
   // the foreground window's controller and thus in the responder chain. Some
   // senders don't have this problem (for example, menus only operate on the
   // foreground window), so this is only an issue for senders that are part of
   // windows.
   BrowserWindowController* targetController = self;
   if ([sender respondsToSelector:@selector(window)])
     targetController = [[sender window] windowController];
   DCHECK([targetController isKindOfClass:[BrowserWindowController class]]);
   DCHECK(targetController->browser_.get());
-  targetController->browser_->ExecuteCommand([sender tag]);
+  NSInteger command;
+  if ([sender respondsToSelector:@selector(command)])
+    command = [sender command];
+  else
+    command = [sender tag];
+  targetController->browser_->ExecuteCommand(command);
 }
 
 // Same as |-commandDispatch:|, but executes commands using a disposition
 // determined by the key flags. If the window is in the background and the
 // command key is down, ignore the command key, but process any other modifiers.
 - (void)commandDispatchUsingKeyModifiers:(id)sender {
   DCHECK(sender);
   // See comment above for why we do this.
   BrowserWindowController* targetController = self;
   if ([sender respondsToSelector:@selector(window)])
     targetController = [[sender window] windowController];
   DCHECK([targetController isKindOfClass:[BrowserWindowController class]]);
-  NSInteger command = [sender tag];
+  NSInteger command;
+  if ([sender respondsToSelector:@selector(command)])
+    command = [sender command];
+  else
+    command = [sender tag];
   NSUInteger modifierFlags = [[NSApp currentEvent] modifierFlags];
   if ((command == IDC_RELOAD) && (modifierFlags & NSShiftKeyMask)) {
     command = IDC_RELOAD_IGNORING_CACHE;
     // Mask off shift so it isn't interpreted as affecting the disposition
     // below.
     modifierFlags &= ~NSShiftKeyMask;
   }
   if (![[sender window] isMainWindow]) {
     // Remove the command key from the flags, it means "keep the window in
     // the background" in this case.
@@ skipping 915 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isNormalWindow {
   return browser_->type() == Browser::TYPE_NORMAL;
 }
 
 @end  // @implementation BrowserWindowController(WindowType)