TabContents -> WebContentsImpl, part 12.

content/browser/web_contents/web_drag_source_mac.mm

 // Copyright (c) 2012 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 "content/browser/web_contents/web_drag_source_mac.h"
 
 #include <sys/param.h>
 
 #include "base/bind.h"
 #include "base/file_path.h"
@@ skipping 80 matching lines @@
 @interface WebDragSource(Private)
 
 - (void)fillPasteboard;
 - (NSImage*)dragImage;
 
 @end  // @interface WebDragSource(Private)
 
 
 @implementation WebDragSource
 
-- (id)initWithContents:(TabContents*)contents
+- (id)initWithContents:(WebContentsImpl*)contents
                   view:(NSView*)contentsView
               dropData:(const WebDropData*)dropData
                  image:(NSImage*)image
                 offset:(NSPoint)offset
             pasteboard:(NSPasteboard*)pboard
      dragOperationMask:(NSDragOperation)dragOperationMask {
   if ((self = [super init])) {
     contents_ = contents;
     DCHECK(contents_);
 
@@ skipping 332 matching lines @@
 
 - (NSImage*)dragImage {
   if (dragImage_)
     return dragImage_;
 
   // Default to returning a generic image.
   return gfx::GetCachedImageWithName(@"nav.pdf");
 }
 
 @end  // @implementation WebDragSource (Private)