Add support for unregistering web intents default by service_url.

chrome/browser/intents/web_intents_registry.h

Index: chrome/browser/intents/web_intents_registry.h
diff --git a/chrome/browser/intents/web_intents_registry.h b/chrome/browser/intents/web_intents_registry.h
index 404d6822f46ba67100d0d3252eeff1dabfbd35b4..b5fd6aacf0c1d240b11a4dcbaee9fa9eb86c5972 100644
--- a/chrome/browser/intents/web_intents_registry.h
+++ b/chrome/browser/intents/web_intents_registry.h
@@ -95,6 +95,10 @@ class WebIntentsRegistry : public ProfileKeyedService {
   virtual void UnregisterDefaultIntentService(
       const DefaultWebIntentService& default_service);
 
+  // Delete all default service entries associated with |service_url|.
+  virtual void UnregisterDefaultIntentServicesForServiceURL(

[James Hawkins, 2012/08/08 16:22:37]

nit: This name is a bit unwieldy; my suggestion:

UnregisterDefaultServiceForURL()

Similarly, I'd rename the methods just above to (Un)registerDefaultService()

[Steve McKay, 2012/08/08 17:54:42]

Since a default service has both a url pattern and a service url I think we need
to qualify which type in the method name.

+      const GURL& service_url);
+
   // Requests the best default intent service for the given invocation
   // parameters.
   // |callback| must not be null.