Fix dragging supported files to tab strip.

chrome/browser/ui/views/tabs/tab_strip.h

Index: chrome/browser/ui/views/tabs/tab_strip.h
diff --git a/chrome/browser/ui/views/tabs/tab_strip.h b/chrome/browser/ui/views/tabs/tab_strip.h
index 8de46e80859c8c888c2d23efba96332f91b86c3b..7e01033da3de56458455f93b33ef5d9226f5867c 100644
--- a/chrome/browser/ui/views/tabs/tab_strip.h
+++ b/chrome/browser/ui/views/tabs/tab_strip.h
@@ -182,6 +182,9 @@ class TabStrip : public views::View,
   // ongoing this does a layout.
   void StopAnimating(bool layout);
 
+  // Called to indicate whether the given URL is a supported file.
+  void FileSupported(const GURL& url, bool supported);
+
   // TabController overrides:
   virtual const ui::ListSelectionModel& GetSelectionModel() OVERRIDE;
   virtual bool SupportsMultipleSelection() OVERRIDE;
@@ -295,6 +298,12 @@ class TabStrip : public views::View,
     views::Widget* arrow_window;
     views::ImageView* arrow_view;
 
+    // The URL for the drop event.
+    GURL url;
+
+    // Whether the MIME type of the file pointed to by |url| is supported.
+    bool file_supported;
+
    private:
     DISALLOW_COPY_AND_ASSIGN(DropInfo);
   };