Update usages of std::map to use ScopedPtrMap.

components/gcm_driver/instance_id/instance_id.h

Index: components/gcm_driver/instance_id/instance_id.h
diff --git a/components/gcm_driver/instance_id/instance_id.h b/components/gcm_driver/instance_id/instance_id.h
index 343b9c5e72c499ebb7f48eb941d73de923bd992d..9adf0e5def2604150b45e9a3f99fdbe5614cc9ee 100644
--- a/components/gcm_driver/instance_id/instance_id.h
+++ b/components/gcm_driver/instance_id/instance_id.h
@@ -10,6 +10,7 @@
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 
 namespace gcm {
@@ -57,8 +58,8 @@ class InstanceID {
   // |app_id|: identifies the application that uses the Instance ID.
   // |gcm_driver|: driver to access the GCM functionalities needed to support
   //               Instance ID.
-  static InstanceID* Create(const std::string& app_id,
-                            gcm::GCMDriver* gcm_driver);
+  static scoped_ptr<InstanceID> Create(const std::string& app_id,
+                                       gcm::GCMDriver* gcm_driver);
 
   virtual ~InstanceID();