Implement InstanceIDAndroid using InstanceIDWithSubtype.java

components/gcm_driver/instance_id/instance_id.cc

Index: components/gcm_driver/instance_id/instance_id.cc
diff --git a/components/gcm_driver/instance_id/instance_id.cc b/components/gcm_driver/instance_id/instance_id.cc
index d89c997efe3d91cd39b861df3ce75a2eda2cacaa..d48b5cafe34ccc49a9a48d04189cea834ccd4d55 100644
--- a/components/gcm_driver/instance_id/instance_id.cc
+++ b/components/gcm_driver/instance_id/instance_id.cc
@@ -6,14 +6,9 @@
 
 namespace instance_id {
 
-InstanceID::InstanceID(const std::string& app_id,
-                       gcm::InstanceIDHandler* handler)
-    : handler_(handler), app_id_(app_id) {
-  DCHECK(handler_);
-}
+InstanceID::InstanceID(const std::string& app_id) : app_id_(app_id) {}
 
-InstanceID::~InstanceID() {
-}
+InstanceID::~InstanceID() {}
 
 void InstanceID::SetTokenRefreshCallback(const TokenRefreshCallback& callback) {
   token_refresh_callback_ = callback;