Mac: give visual feedback for bookmark button drags.

chrome/browser/cocoa/bookmark_bar_view_unittest.mm

 // Copyright (c) 2009 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/scoped_nsobject.h"
 #import "chrome/browser/cocoa/bookmark_bar_view.h"
 #import "chrome/browser/cocoa/bookmark_button.h"
 #import "chrome/browser/cocoa/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
@@ skipping 42 matching lines @@
 - (BOOL)dragButton:(BookmarkButton*)button to:(NSPoint)point {
   pong_ = YES;
   return YES;
 }
 
 // Confirm the pong.
 - (BOOL)dragButtonToPong {
   return pong_;
 }
 
+- (CGFloat)indicatorPosForDragOfButton:(BookmarkButton*)sourceButton
+                               toPoint:(NSPoint)point {
+  return 0;
+}
+
 @end
 
 namespace {
 
 class BookmarkBarViewTest : public CocoaTest {
  public:
   virtual void SetUp() {
     CocoaTest::SetUp();
     view_.reset([[BookmarkBarView alloc] init]);
   }
 
   scoped_nsobject<BookmarkBarView> view_;
 };
 
 TEST_F(BookmarkBarViewTest, CanDragWindow) {
   EXPECT_FALSE([view_ mouseDownCanMoveWindow]);
 }
 
 TEST_F(BookmarkBarViewTest, BookmarkButtonDragAndDrop) {
   scoped_nsobject<FakeBookmarkDraggingInfo>
       info([[FakeBookmarkDraggingInfo alloc] init]);
 
   [view_ setController:info.get()];
   EXPECT_EQ([view_ draggingEntered:(id)info.get()], NSDragOperationMove);
   EXPECT_TRUE([view_ performDragOperation:(id)info.get()]);
   EXPECT_TRUE([info dragButtonToPong]);
 }
 
 }  // namespace