Fix dragging supported files to tab strip.

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

Index: chrome/browser/ui/views/tabs/tab_strip_controller.h
diff --git a/chrome/browser/ui/views/tabs/tab_strip_controller.h b/chrome/browser/ui/views/tabs/tab_strip_controller.h
index afe7a23a3b727b888a6388d86370b6fe214b3cff..39ced9e34dab58f6b1f90663a1d35b9c5bb44af4 100644
--- a/chrome/browser/ui/views/tabs/tab_strip_controller.h
+++ b/chrome/browser/ui/views/tabs/tab_strip_controller.h
@@ -112,6 +112,10 @@ class TabStripController {
   // This is also called when the tabs that the user is dragging were detached
   // from this tabstrip but the user is still dragging the tabs.
   virtual void OnStoppedDraggingTabs() = 0;
+
+  // Determines whether the file specified by the URL is supported. Should
+  // invoke TabStrip::FileSupported to report the result.

[sky, 2013/11/26 00:12:29]

Document that FileSupported() is invoked asynchronously.

[michaelpg, 2013/11/26 04:50:13]

Done.

+  virtual void CheckFileSupported(GURL url) = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_CONTROLLER_H_