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

chrome/common/extensions/extension_set.h

Index: chrome/common/extensions/extension_set.h
diff --git a/chrome/common/extensions/extension_set.h b/chrome/common/extensions/extension_set.h
index 340755705c3e54b64069ef46b97c5e579e8bede7..af8fc04b5521fd75f78de5ac6cb2e4f9a6d8c776 100644
--- a/chrome/common/extensions/extension_set.h
+++ b/chrome/common/extensions/extension_set.h
@@ -102,6 +102,13 @@ class ExtensionSet {
   // EventBindings::HandleContextCreated)
   const Extension* GetByURL(const ExtensionURLInfo& info) const;
 
+  // Returns the extension whose web extent contains the URL.
+  const Extension* GetByWebExtent(const GURL& url) const;
+
+  // Returns an extension that contains any URL that overlaps with the given
+  // extent, if one exists.
+  const Extension* GetByOverlappingWebExtent(const URLPatternSet& extent) const;
+
   // Returns true if |new_url| is in the extent of the same extension as
   // |old_url|.  Also returns true if neither URL is in an app.
   bool InSameExtent(const GURL& old_url, const GURL& new_url) const;