[Mac]Implement ViewID support.

chrome/browser/cocoa/base_view_unittest.mm

Index: chrome/browser/cocoa/base_view_unittest.mm
diff --git a/chrome/browser/cocoa/base_view_unittest.mm b/chrome/browser/cocoa/base_view_unittest.mm
index bbfc75e04a28bbf24d46b239e0517c765a180841..82aeb8e78502ab5fdf3eb1f6d15b899d8ccb8c96 100644
--- a/chrome/browser/cocoa/base_view_unittest.mm
+++ b/chrome/browser/cocoa/base_view_unittest.mm
@@ -1,4 +1,4 @@
-// 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.
 
@@ -7,6 +7,7 @@
 #include "base/scoped_nsobject.h"
 #import "chrome/browser/cocoa/base_view.h"
 #import "chrome/browser/cocoa/cocoa_test_helper.h"
+#import "chrome/browser/cocoa/view_id_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
@@ -45,4 +46,16 @@ TEST_F(BaseViewTest, NSRectToRect) {
   EXPECT_EQ(back_again.size.height, convert.size.height);
 }
 
+TEST_F(BaseViewTest, Tag) {
+  [view_ setViewID:VIEW_ID_TAB_0];
+  EXPECT_EQ(VIEW_ID_TAB_0, [view_ viewID]);
+  EXPECT_EQ(view_id_util::ViewIDToTag(VIEW_ID_TAB_0), [view_ tag]);
+  EXPECT_EQ((NSView*)view_, view_id_util::GetView(test_window(), VIEW_ID_TAB_0));
+
+  [view_ setViewID:VIEW_ID_TOOLBAR];
+  EXPECT_EQ(VIEW_ID_TOOLBAR, [view_ viewID]);
+  EXPECT_EQ(view_id_util::ViewIDToTag(VIEW_ID_TOOLBAR), [view_ tag]);
+  EXPECT_EQ((NSView*)view_, view_id_util::GetView(test_window(), VIEW_ID_TOOLBAR));
+}
+
 }  // namespace