Push API: Validate storage before returning cached subscriptions

components/gcm_driver/gcm_driver_android.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/gcm_driver/gcm_driver_android.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "jni/GCMDriver_jni.h"
 
 using base::android::AppendJavaStringArrayToStringVector;
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
 using base::android::JavaByteArrayToByteVector;
 using base::android::JavaParamRef;
 
 namespace gcm {
@@ skipping 84 matching lines @@
                                       message_byte_size);
 
   DispatchMessage(app_id, message);
 }
 
 // static
 bool GCMDriverAndroid::RegisterJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
+void GCMDriverAndroid::ValidateRegistration(
+    const std::string& app_id,
+    const std::vector<std::string>& sender_ids,
+    const std::string& registration_id,
+    const ValidateRegistrationCallback& callback) {
+  // gcm_driver doesn't store registration IDs on Android, so assume it's valid.
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(callback, true /* is_valid */));
+}
+
 void GCMDriverAndroid::OnSignedIn() {
 }
 
 void GCMDriverAndroid::OnSignedOut() {
 }
 
 void GCMDriverAndroid::AddConnectionObserver(GCMConnectionObserver* observer) {
 }
 
 void GCMDriverAndroid::RemoveConnectionObserver(
@@ skipping 130 matching lines @@
   NOTIMPLEMENTED();
 }
 
 void GCMDriverAndroid::RecordDecryptionFailure(
     const std::string& app_id,
     GCMEncryptionProvider::DecryptionResult result) {
   recorder_.RecordDecryptionFailure(app_id, result);
 }
 
 }  // namespace gcm