Integrate InstanceID with GCM crypto provider

components/gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc

Index: components/gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc
diff --git a/components/gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc b/components/gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc
index 56519f1a9dd5194a68a862ffa50b3418b3885f91..0ee7f0b6320f07f2dafc1f3e97a0102ddd48b5cc 100644
--- a/components/gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc
+++ b/components/gcm_driver/instance_id/fake_gcm_driver_for_instance_id.cc
@@ -14,8 +14,8 @@
 
 namespace instance_id {
 
-FakeGCMDriverForInstanceID::FakeGCMDriverForInstanceID() {
-}
+FakeGCMDriverForInstanceID::FakeGCMDriverForInstanceID()
+    : gcm::FakeGCMDriver(base::ThreadTaskRunnerHandle::Get()) {}
 
 FakeGCMDriverForInstanceID::~FakeGCMDriverForInstanceID() {
 }