sync: Count and report reflected updates

sync/protocol/sync.proto

Index: sync/protocol/sync.proto
diff --git a/sync/protocol/sync.proto b/sync/protocol/sync.proto
index d1aea72987aef480d199ccc0fe7c681d4d8fcb97..27e82e26d1a5ea5e1164175ff5984b2c5a82d681 100644
--- a/sync/protocol/sync.proto
+++ b/sync/protocol/sync.proto
@@ -19,6 +19,7 @@ import "app_setting_specifics.proto";
 import "app_specifics.proto";
 import "autofill_specifics.proto";
 import "bookmark_specifics.proto";
+import "get_updates_caller_info.proto";
 import "extension_setting_specifics.proto";
 import "extension_specifics.proto";
 import "nigori_specifics.proto";
@@ -316,40 +317,6 @@ message CommitMessage {
   repeated ChromiumExtensionsActivity extensions_activity = 3;
 };
 
-message GetUpdatesCallerInfo {
-  enum GetUpdatesSource {
-    UNKNOWN = 0;  // The source was not set by the caller.
-    FIRST_UPDATE = 1;  // First request after browser restart.  Not to
-                       // be confused with "NEW_CLIENT".
-    LOCAL = 2;  // The source of the update was a local change.
-    NOTIFICATION = 3;  // The source of the update was a p2p notification.
-    PERIODIC = 4;  // The source of the update was periodic polling.
-    SYNC_CYCLE_CONTINUATION = 5;  // The source of the update was a
-                                  // continuation of a previous update.
-    CLEAR_PRIVATE_DATA = 6;       // Source is a call to remove all private data
-    NEWLY_SUPPORTED_DATATYPE = 7;   // The client is in configuration mode
-                                    // because it's syncing all datatypes, and
-                                    // support for a new datatype was recently
-                                    // released via a software auto-update.
-    MIGRATION = 8;         // The client is in configuration mode because a
-                           // MIGRATION_DONE error previously returned by the
-                           // server necessitated resynchronization.
-    NEW_CLIENT = 9;        // The client is in configuration mode because the
-                           // user enabled sync for the first time.  Not to be
-                           // confused with FIRST_UPDATE.
-    RECONFIGURATION = 10;  // The client is in configuration mode because the
-                           // user opted to sync a different set of datatypes.
-    DATATYPE_REFRESH = 11;    // A datatype has requested a refresh. This is
-                              // typically used when datatype's have custom
-                              // sync UI, e.g. sessions.
-  }
-
-  required GetUpdatesSource source = 1;
-
-  // True only if notifications were enabled for this GetUpdateMessage.
-  optional bool notifications_enabled = 2;
-};
-
 message DataTypeProgressMarker {
   // An integer identifying the data type whose progress is tracked by this
   // marker.  The legitimate values of this field correspond to the protobuf