Make ExtensionService use ExtensionSet.

chrome/common/extensions/extension_set.cc

Index: chrome/common/extensions/extension_set.cc
diff --git a/chrome/common/extensions/extension_set.cc b/chrome/common/extensions/extension_set.cc
index 105420bc9605d368c96f8fae11fa6f772e158342..5984cb52459d1d36e6d6b6c158e80b724ba4477f 100644
--- a/chrome/common/extensions/extension_set.cc
+++ b/chrome/common/extensions/extension_set.cc
@@ -17,6 +17,10 @@ size_t ExtensionSet::size() const {
   return extensions_.size();
 }
 
+bool ExtensionSet::empty() const {

[Aaron Boodman, 2011/12/01 08:27:12]

I prefer is_empty() to avoid confusion with clear(). Though I can understand the
desire for consistency with STL.

[Yoyo Zhou, 2011/12/05 19:34:09]

Done.

+  return extensions_.empty();
+}
+
 bool ExtensionSet::Contains(const std::string& extension_id) const {
   return extensions_.find(extension_id) != extensions_.end();
 }
@@ -29,7 +33,11 @@ void ExtensionSet::Remove(const std::string& id) {
   extensions_.erase(id);
 }
 
-std::string ExtensionSet::GetIdByURL(const GURL& url) const {
+void ExtensionSet::Clear() {
+  extensions_.clear();
+}
+
+std::string ExtensionSet::GetIDByURL(const GURL& url) const {
   if (url.SchemeIs(chrome::kExtensionScheme))
     return url.host();