Extract GCMClient data types into separate gcm_types.h

chrome/browser/services/gcm/gcm_app_handler.h

Index: chrome/browser/services/gcm/gcm_app_handler.h
diff --git a/chrome/browser/services/gcm/gcm_app_handler.h b/chrome/browser/services/gcm/gcm_app_handler.h
index e53a25b766d697d7b4b9c15c07b735d29d902459..bce7d66e9db2b4c6d8a8d91e1c79644c220c61cb 100644
--- a/chrome/browser/services/gcm/gcm_app_handler.h
+++ b/chrome/browser/services/gcm/gcm_app_handler.h
@@ -8,10 +8,12 @@
 #include <string>
 
 #include "base/basictypes.h"
-#include "google_apis/gcm/gcm_client.h"
 
 namespace gcm {
 
+struct IncomingMessage;
+struct SendErrorDetails;
+
 // Defines the interface to provide handling and event routing logic for a given
 // app.
 class GCMAppHandler {
@@ -26,15 +28,14 @@ class GCMAppHandler {
 
   // Called when a GCM message has been received.
   virtual void OnMessage(const std::string& app_id,
-                         const GCMClient::IncomingMessage& message) = 0;
+                         const IncomingMessage& message) = 0;
 
   // Called when some GCM messages have been deleted from the server.
   virtual void OnMessagesDeleted(const std::string& app_id) = 0;
 
   // Called when a GCM message failed to be delivered.
-  virtual void OnSendError(
-      const std::string& app_id,
-      const GCMClient::SendErrorDetails& send_error_details) = 0;
+  virtual void OnSendError(const std::string& app_id,
+                           const SendErrorDetails& send_error_details) = 0;
 };
 
 }  // namespace gcm