Revert of Fix the handling of user gestures for external protocol handler dialogs.

extensions/browser/extensions_browser_client.h

Index: extensions/browser/extensions_browser_client.h
diff --git a/extensions/browser/extensions_browser_client.h b/extensions/browser/extensions_browser_client.h
index 132e77aec1cb858acb943fe8195cbc1777aee6ba..2e3d26d8aede6914eb6d4679336179ee51ca8bcf 100644
--- a/extensions/browser/extensions_browser_client.h
+++ b/extensions/browser/extensions_browser_client.h
@@ -106,6 +106,10 @@
   // version for later comparison.
   virtual bool DidVersionUpdate(content::BrowserContext* context) = 0;
 
+  // Permits an external protocol handler to be launched. See
+  // ExternalProtocolHandler::PermitLaunchUrl() in Chrome.
+  virtual void PermitExternalProtocolHandler() = 0;
+
   // Creates a new AppSorting instance.
   virtual scoped_ptr<AppSorting> CreateAppSorting() = 0;