Move Extension into extensions namespace

chrome/browser/extensions/pending_extension_manager.h

Index: chrome/browser/extensions/pending_extension_manager.h
diff --git a/chrome/browser/extensions/pending_extension_manager.h b/chrome/browser/extensions/pending_extension_manager.h
index 4aeecbfa029bc61b356fdbc0dac22568d0c46f9b..8668892fc2d456933280823fd48685f7f5f8d772 100644
--- a/chrome/browser/extensions/pending_extension_manager.h
+++ b/chrome/browser/extensions/pending_extension_manager.h
@@ -74,14 +74,14 @@ class PendingExtensionManager {
   // to be fetched, installed, and activated.
   bool AddFromExternalUpdateUrl(const std::string& id,
                                 const GURL& update_url,
-                                Extension::Location location);
+                                extensions::Extension::Location location);
 
   // Add a pending extension record for an external CRX file.
   // Return true if the CRX should be installed, false if an existing
   // pending record overrides it.
   bool AddFromExternalFile(
       const std::string& id,
-      Extension::Location location,
+      extensions::Extension::Location location,
       const Version& version);
 
   // Get the set of pending IDs that should be installed from an update URL.
@@ -102,7 +102,7 @@ class PendingExtensionManager {
       PendingExtensionInfo::ShouldAllowInstallPredicate should_allow_install,
       bool is_from_sync,
       bool install_silently,
-      Extension::Location install_source);
+      extensions::Extension::Location install_source);
 
   // Add a pending extension record directly.  Used for unit tests that need
   // to set an inital state. Use friendship to allow the tests to call this