Move some sync/notifier to components/invalidation

Moves many of the files in sync/notifier to components/invalidation.

This change does not introduce any new dependencies.  The relevant
dependency rules both before and after this change should be:
- chrome/browser/invalidation and chrome in general depend on
  components/invalidation.
- components/invalidation depends on sync/notifier and sync in
  general.
- sync/notifier, components/invalidation, and various parts of
  chrome all depend on sync/internal_api/public.

The eventual goal is to move all of sync/notifier into
components/invalidation.  The invalidation-related parts of
sync/internal_api/public should be moved to components/invalidation,
too.  This will allow us to remove the deopendencies from
components/invalidation to sync, and remove sync's dependencies on
cacheinvalidation and libjingle.

This change is a regression in terms of shared library componentization.
the files in the sync/notifier folder could be built as a shared
library.  The files in compononents/invalidation do not support this
yet.  The SYNC_EXPORT declarations in the moved files have been changed
to INVALIDATION_EXPORT so as to not lose this information, but the
macros are currently #defined to no-ops.

This change does not attempt to rename any classes or namespaces.
Many of the files ported from sync/notifier still use the syncer
namespace.  Some, like SyncSystemResources, still have names tied
to their sync heritage.  This will be addressed in future CLs.

Some non-trivial or non-obvious changes include:
- invalidator_state.h was moved to sync/internal_api/public/base so it
could be shared by both sync/ and components/invalidation.  This should
be fixed in a future CL.
- FromNotifierReason was split out of invalidator_state.h and moved to
the newly-created components/invalidator_reason_util.h

TBR=zea,rtenneti,mallinath,dcheng
BUG=259559

Review URL: https://codereview.chromium.org/294123004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@274350 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 51 insertions, 0 deletions

diff --git a/components/invalidation/gcm_network_channel_delegate.h b/components/invalidation/gcm_network_channel_delegate.h
new file mode 100644
index 0000000..5229dec
--- /dev/null
+++ b/components/invalidation/gcm_network_channel_delegate.h
@@ -0,0 +1,51 @@
+// 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.
+
+#ifndef COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
+#define COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_
+
+#include <string>
+
+#include "base/callback.h"
+#include "google_apis/gcm/gcm_client.h"
+
+class GoogleServiceAuthError;
+
+namespace syncer {
+
+// Delegate for GCMNetworkChannel.
+// GCMNetworkChannel needs Register to register with GCM client and obtain gcm
+// registration id. This id is used for building URL to cache invalidation
+// endpoint.
+// It needs RequestToken and InvalidateToken to get access token to include it
+// in HTTP message to server.
+// GCMNetworkChannel lives on IO thread therefore calls will be made on IO
+// thread and callbacks should be invoked there as well.
+class GCMNetworkChannelDelegate {
+ public:
+  typedef base::Callback<void(const GoogleServiceAuthError& error,
+                              const std::string& token)> RequestTokenCallback;
+  typedef base::Callback<void(const std::string& registration_id,
+                              gcm::GCMClient::Result result)> RegisterCallback;
+  typedef base::Callback<void(const std::string& message,
+                              const std::string& echo_token)> MessageCallback;
+
+  virtual ~GCMNetworkChannelDelegate() {}
+
+  virtual void Initialize() = 0;
+  // Request access token. Callback should be called either with access token or
+  // error code.
+  virtual void RequestToken(RequestTokenCallback callback) = 0;
+  // Invalidate access token that was rejected by server.
+  virtual void InvalidateToken(const std::string& token) = 0;
+
+  // Request registration_id from GCMService. Callback should be called with
+  // either registration id or error code.
+  virtual void Register(RegisterCallback callback) = 0;
+  // Provide callback for incoming messages from GCM.
+  virtual void SetMessageReceiver(MessageCallback callback) = 0;
+};
+}  // namespace syncer
+
+#endif  // COMPONENTS_INVALIDATION_GCM_NETWORK_CHANNEL_DELEGATE_H_