Move/replace/rename URL-based extension getters from ExtensionService to/in ExtensionSet.

chrome/browser/extensions/extension_webstore_private_api.cc

Index: chrome/browser/extensions/extension_webstore_private_api.cc
diff --git a/chrome/browser/extensions/extension_webstore_private_api.cc b/chrome/browser/extensions/extension_webstore_private_api.cc
index d76da497bd64409ca37f601101011c5636367039..fb4bac0f266fee988752815fcf1b64ddf83d82da 100644
--- a/chrome/browser/extensions/extension_webstore_private_api.cc
+++ b/chrome/browser/extensions/extension_webstore_private_api.cc
@@ -72,7 +72,8 @@ bool IsWebStoreURL(Profile* profile, const GURL& url) {
     NOTREACHED();
     return false;
   }
-  return (service->GetExtensionByWebExtent(url) == store);
+  return (service->extensions()->GetByWebExtent(ExtensionURLInfo(url)) ==
+          store);
 }
 
 // Whitelists extension IDs for use by webstorePrivate.silentlyInstall.