Extract GCMClient data types into separate gcm_types.h

chrome/browser/services/gcm/default_gcm_app_handler.cc

Index: chrome/browser/services/gcm/default_gcm_app_handler.cc
diff --git a/chrome/browser/services/gcm/default_gcm_app_handler.cc b/chrome/browser/services/gcm/default_gcm_app_handler.cc
index 7b1440921f878b5334690d6e4e3e05d125fb8cf5..9a61e0c6874b1548fc08efbca9f611d137765cbe 100644
--- a/chrome/browser/services/gcm/default_gcm_app_handler.cc
+++ b/chrome/browser/services/gcm/default_gcm_app_handler.cc
@@ -20,7 +20,7 @@ void DefaultGCMAppHandler::ShutdownHandler() {
 
 void DefaultGCMAppHandler::OnMessage(
     const std::string& app_id,
-    const GCMClient::IncomingMessage& message) {
+    const IncomingMessage& message) {
   LOG(ERROR) << "No app handler is found to route message for " << app_id;
 }
 
@@ -31,7 +31,7 @@ void DefaultGCMAppHandler::OnMessagesDeleted(const std::string& app_id) {
 
 void DefaultGCMAppHandler::OnSendError(
     const std::string& app_id,
-    const GCMClient::SendErrorDetails& send_error_details) {
+    const SendErrorDetails& send_error_details) {
   LOG(ERROR) << "No app handler is found to route send error message for "
              << app_id;
 }