Split Mac WebDropTarget into two, content and chrome.

chrome/browser/tab_contents/tab_contents_view_mac.h

Index: chrome/browser/tab_contents/tab_contents_view_mac.h
diff --git a/chrome/browser/tab_contents/tab_contents_view_mac.h b/chrome/browser/tab_contents/tab_contents_view_mac.h
index 4804d49b48dc59fddd722d500b9926023ed7a8b3..ecf254563b9bb69025cafbd84b707f4a2cff87a6 100644
--- a/chrome/browser/tab_contents/tab_contents_view_mac.h
+++ b/chrome/browser/tab_contents/tab_contents_view_mac.h
@@ -27,6 +27,7 @@ class RenderViewContextMenuMac;
 @class SadTabController;
 class SkBitmap;
 class TabContentsViewMac;
+class WebDragBookmarkHandlerMac;
 @class WebDragSource;
 @class WebDropTarget;
 namespace gfx {
@@ -38,6 +39,7 @@ class Point;
   TabContentsViewMac* tabContentsView_;  // WEAK; owns us
   scoped_nsobject<WebDragSource> dragSource_;
   scoped_nsobject<WebDropTarget> dropTarget_;
+  scoped_ptr<WebDragBookmarkHandlerMac> bookmarkHandler_;
 }
 
 // Expose this, since sometimes one needs both the NSView and the TabContents.