Split Mac WebDropTarget into two, content and chrome.

chrome/browser/ui/cocoa/tab_contents/web_drop_target.h

Index: chrome/browser/ui/cocoa/tab_contents/web_drop_target.h
diff --git a/chrome/browser/ui/cocoa/tab_contents/web_drop_target.h b/chrome/browser/ui/cocoa/tab_contents/web_drop_target.h
index 566a585b1fef665eada6c4d0c1ad81a46b26b06d..c7c545199b32bbd4c5a20c8d443a0edd9495e30a 100644
--- a/chrome/browser/ui/cocoa/tab_contents/web_drop_target.h
+++ b/chrome/browser/ui/cocoa/tab_contents/web_drop_target.h
@@ -9,9 +9,12 @@
 class GURL;
 class RenderViewHost;
 class TabContents;
-class TabContentsWrapper;
 struct WebDropData;
 
+namespace content {
+class WebDragDestDelegate;
+}
+
 // A typedef for a RenderViewHost used for comparison purposes only.
 typedef RenderViewHost* RenderViewHostIdentifier;
 
@@ -24,10 +27,8 @@ typedef RenderViewHost* RenderViewHostIdentifier;
   // Our associated TabContents. Weak reference.
   TabContents* tabContents_;
 
-  // The TabContentsWrapper for |tab_contents_|.
-  // Weak reference; may be NULL if the contents aren't contained in a wrapper
-  // (e.g. WebUI dialogs).
-  TabContentsWrapper* tab_;
+  // Delegate; weak.
+  content::WebDragDestDelegate* delegate_;
 
   // Updated asynchronously during a drag to tell us whether or not we should
   // allow the drop.
@@ -43,6 +44,8 @@ typedef RenderViewHost* RenderViewHostIdentifier;
 // (if necessary).
 - (id)initWithTabContents:(TabContents*)contents;
 
+- (void)setDragDelegate:(content::WebDragDestDelegate*)delegate;
+
 // Sets the current operation negotiated by the source and destination,
 // which determines whether or not we should allow the drop. Takes effect the
 // next time |-draggingUpdated:| is called.