Fix chromium-style compile error that got in the tree since yesterday.

chrome/browser/extensions/extension_special_storage_policy.cc

Index: chrome/browser/extensions/extension_special_storage_policy.cc
diff --git a/chrome/browser/extensions/extension_special_storage_policy.cc b/chrome/browser/extensions/extension_special_storage_policy.cc
index 1a840fcff9ae8d67657a50bf5ba761bb3fbc709b..0a405c76342a7770314683425f6861660b181126 100644
--- a/chrome/browser/extensions/extension_special_storage_policy.cc
+++ b/chrome/browser/extensions/extension_special_storage_policy.cc
@@ -8,6 +8,8 @@
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/url_constants.h"
 
+ExtensionSpecialStoragePolicy::ExtensionSpecialStoragePolicy() {}
+
 bool ExtensionSpecialStoragePolicy::IsStorageProtected(const GURL& origin) {
   if (origin.SchemeIs(chrome::kExtensionScheme))
     return true;
@@ -54,10 +56,16 @@ void ExtensionSpecialStoragePolicy::RevokeRightsForAllExtensions() {
   unlimited_extensions_.Clear();
 }
 
+ExtensionSpecialStoragePolicy::~ExtensionSpecialStoragePolicy() {}
+
 //-----------------------------------------------------------------------------
 // SpecialCollection helper class
 //-----------------------------------------------------------------------------
 
+ExtensionSpecialStoragePolicy::SpecialCollection::SpecialCollection() {}
+
+ExtensionSpecialStoragePolicy::SpecialCollection::~SpecialCollection() {}
+
 bool ExtensionSpecialStoragePolicy::SpecialCollection::Contains(
     const GURL& origin) {
   CachedResults::const_iterator found = cached_resuts_.find(origin);