List message decryption failures on chrome://gcm-internals

components/gcm_driver/gcm_client.h

Index: components/gcm_driver/gcm_client.h
diff --git a/components/gcm_driver/gcm_client.h b/components/gcm_driver/gcm_client.h
index fa4175ae661e793b104aeeb19d335d1c89f5d02a..5a24c4d597e00aedaf90dbf31f79ac1564cc864e 100644
--- a/components/gcm_driver/gcm_client.h
+++ b/components/gcm_driver/gcm_client.h
@@ -14,6 +14,7 @@
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/gcm_driver/common/gcm_messages.h"
+#include "components/gcm_driver/crypto/gcm_encryption_provider.h"
 #include "components/gcm_driver/gcm_activity.h"
 #include "components/gcm_driver/registration_info.h"
 
@@ -268,6 +269,11 @@ class GCMClient {
                     const std::string& receiver_id,
                     const OutgoingMessage& message) = 0;
 
+  // Records a decryption failure due to |reason| for the |app_id|.
+  virtual void RecordDecryptionFailure(
+      const std::string& app_id,
+      GCMEncryptionProvider::DecryptionFailure reason) = 0;
+
   // Enables or disables internal activity recording.
   virtual void SetRecording(bool recording) = 0;