Hook up the Push API with GCM's new ability to own encryption keys.

components/gcm_driver/fake_gcm_driver.cc

Index: components/gcm_driver/fake_gcm_driver.cc
diff --git a/components/gcm_driver/fake_gcm_driver.cc b/components/gcm_driver/fake_gcm_driver.cc
index 8572e83723806cc578ffa7e8c511e1a26b04f274..3ba5614dcd6f8c85458650e693c691375a9684a9 100644
--- a/components/gcm_driver/fake_gcm_driver.cc
+++ b/components/gcm_driver/fake_gcm_driver.cc
@@ -4,9 +4,16 @@
 
 #include "components/gcm_driver/fake_gcm_driver.h"
 
+#include "base/files/file_path.h"
+
 namespace gcm {
 
-FakeGCMDriver::FakeGCMDriver() {
+FakeGCMDriver::FakeGCMDriver() : GCMDriver(base::FilePath(), nullptr) {
+}
+
+FakeGCMDriver::FakeGCMDriver(
+    const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner)
+    : GCMDriver(base::FilePath(), blocking_task_runner) {
 }
 
 FakeGCMDriver::~FakeGCMDriver() {