[Mac]Implement ViewID support. (third approach)

chrome/browser/cocoa/infobar_container_controller.mm

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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.
 
 #include "base/logging.h"
 #include "base/mac_util.h"
 #import "chrome/browser/cocoa/animatable_view.h"
 #include "chrome/browser/cocoa/infobar.h"
 #import "chrome/browser/cocoa/infobar_container_controller.h"
 #import "chrome/browser/cocoa/infobar_controller.h"
 #include "chrome/browser/cocoa/tab_strip_model_observer_bridge.h"
+#import "chrome/browser/cocoa/view_id_util.h"
 #include "chrome/browser/tab_contents/infobar_delegate.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/notification_service.h"
 #include "skia/ext/skia_utils_mac.h"
 
 // C++ class that receives INFOBAR_ADDED and INFOBAR_REMOVED
 // notifications and proxies them back to |controller|.
 class InfoBarNotificationObserver : public NotificationObserver {
  public:
   InfoBarNotificationObserver(InfoBarContainerController* controller)
@@ skipping 64 matching lines @@
 
     // NSMutableArray needs an initial capacity, and we rarely ever see
     // more than two infobars at a time, so that seems like a good choice.
     infobarControllers_.reset([[NSMutableArray alloc] initWithCapacity:2]);
   }
   return self;
 }
 
 - (void)dealloc {
   DCHECK([infobarControllers_ count] == 0);
+  view_id_util::UnsetID([self view]);
   [super dealloc];
 }
 
+- (void)awakeFromNib {
+  // The info bar container view is an ordinary NSView object, so we set its
+  // ViewID here.
+  view_id_util::SetID([self view], VIEW_ID_INFO_BAR_CONTAINER);
+}
+
 - (void)removeDelegate:(InfoBarDelegate*)delegate {
   DCHECK(currentTabContents_);
   currentTabContents_->RemoveInfoBar(delegate);
 }
 
 - (void)removeController:(InfoBarController*)controller {
   if (![infobarControllers_ containsObject:controller])
     return;
 
   // This code can be executed while InfoBarController is still on the stack, so
@@ skipping 122 matching lines @@
     frame.size.width = NSWidth(containerBounds);
     frame.origin.y = minY;
     minY += frame.size.height;
     [view setFrame:frame];
   }
 
   [resizeDelegate_ resizeView:[self view] newHeight:[self desiredHeight]];
 }
 
 @end