[GCM] Update ResetStore histograms

components/gcm_driver/gcm_client_impl.cc

Index: components/gcm_driver/gcm_client_impl.cc
diff --git a/components/gcm_driver/gcm_client_impl.cc b/components/gcm_driver/gcm_client_impl.cc
index 080a7d006fb208bdbcff659566dec87c476f049b..c1a02de6be833a3163cdb78274522a8846c391f5 100644
--- a/components/gcm_driver/gcm_client_impl.cc
+++ b/components/gcm_driver/gcm_client_impl.cc
@@ -233,7 +233,8 @@ void RecordOutgoingMessageToUMA(const gcm::OutgoingMessage& message) {
 }
 
 void RecordResetStoreErrorToUMA(ResetStoreError error) {
-  UMA_HISTOGRAM_ENUMERATION("GCM.ResetStore", error, RESET_STORE_ERROR_COUNT);
+  UMA_HISTOGRAM_ENUMERATION("GCM.ResetStoreError", error,
+                            RESET_STORE_ERROR_COUNT);
 }
 
 }  // namespace
@@ -394,7 +395,7 @@ void GCMClientImpl::OnLoadCompleted(
       }
     } else {
       // Otherwise, destroy the store to try again.
-      ResetStore();
+      ResetStore(LOAD_FAILURE);
     }
     return;
   }
@@ -543,7 +544,7 @@ void GCMClientImpl::DestroyStoreWhenNotNeeded() {
                       weak_ptr_factory_.GetWeakPtr()));
 }
 
-void GCMClientImpl::ResetStore() {
+void GCMClientImpl::ResetStore(ResetReason reset_reason) {
   // If already being reset, don't do it again. We want to prevent from
   // resetting and loading from the store again and again.
   if (gcm_store_reset_) {
@@ -552,6 +553,8 @@ void GCMClientImpl::ResetStore() {
     return;
   }
   gcm_store_reset_ = true;
+  UMA_HISTOGRAM_ENUMERATION("GCM.ResetStoreReason", reset_reason,
+                            RESET_REASON_COUNT);
 
   // Destroy the GCM store to start over.
   gcm_store_->Destroy(base::Bind(&GCMClientImpl::ResetStoreCallback,
@@ -706,7 +709,7 @@ void GCMClientImpl::OnCheckinCompleted(
   if (response_code == net::HTTP_UNAUTHORIZED ||
       response_code == net::HTTP_BAD_REQUEST) {
     LOG(ERROR) << "Checkin rejected. Resetting GCM Store.";
-    ResetStore();
+    ResetStore(CHECKIN_REJECTED);
     return;
   }