[Mac]Implement ViewID support.

chrome/browser/cocoa/tab_controller_unittest.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.
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/scoped_nsobject.h"
 #import "chrome/browser/cocoa/tab_controller.h"
 #import "chrome/browser/cocoa/tab_controller_target.h"
 #include "chrome/browser/cocoa/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 38 matching lines @@
                                    pressure:1.0];
   [window postEvent:up atStart:YES];
 }
 - (void)commandDispatch:(TabStripModel::ContextMenuCommand)command
           forController:(TabController*)controller {
 }
 - (BOOL)isCommandEnabled:(TabStripModel::ContextMenuCommand)command
            forController:(TabController*)controller {
   return NO;
 }
+- (NSInteger)indexForTabController:(TabController*)controller
+                           inTotal:(NSInteger*)total {
+  if (total)
+    *total = 1;
+  return 0;
+}
 @end
 
 namespace {
 
 // The dragging code in TabView makes heavy use of autorelease pools so
 // inherit from CocoaTest to have one created for us.
 class TabControllerTest : public CocoaTest {
  public:
   TabControllerTest() { }
 };
@@ skipping 188 matching lines @@
   int cap = [controller iconCapacity];
   EXPECT_GT(cap, 0);
 
   // Asking the view for its menu should yield a valid menu.
   NSMenu* menu = [[controller view] menu];
   EXPECT_TRUE(menu);
   EXPECT_GT([menu numberOfItems], 0);
 }
 
 }  // namespace