Update client-side sync.proto file so that it is in sync

sync/protocol/sync.proto

Index: sync/protocol/sync.proto
diff --git a/sync/protocol/sync.proto b/sync/protocol/sync.proto
index b89b9b74bfa198b63f75193a7d271ea6b8d181b1..445fa413840370aa4ccd49c28466c313c8cbc67e 100644
--- a/sync/protocol/sync.proto
+++ b/sync/protocol/sync.proto
@@ -590,6 +590,12 @@ message AuthenticateMessage {
   required string auth_token = 1;
 };
 
+message ClearUserDataMessage {
+};
+
+message ClearUserDataResponse {
+};
+
 // The client must preserve, store, and resend the chip bag with
 // every request.  The server depends on the chip bag in order
 // to precisely choreograph a client-server state machines.
@@ -637,8 +643,7 @@ message ClientToServerMessage {
   optional AuthenticateMessage authenticate = 6;
 
   // Request to clear all Chromium data from the server.
-  // DEPRECATED - this field was never used in production.
-  // optional ClearUserDataMessage clear_user_data = 9;
+  optional ClearUserDataMessage clear_user_data = 9;
 
   optional string store_birthday = 7; // Opaque store ID; if it changes, duck!
   // The client sets this if it detects a sync issue. The server will tell it
@@ -668,6 +673,27 @@ message ClientToServerMessage {
   optional string invalidator_client_id = 14;
 };
 
+// This request allows the client to convert a specific crash identifier
+// into more general information (e.g. hash of the crashing call stack)
+// suitable for upload in an (authenticated) DebugInfo event.
+message GetCrashInfoRequest {
+  // Id of the uploaded crash.
+  optional string crash_id = 1;
+
+  // Time that the crash occurred.
+  optional int64 crash_time_millis = 2;
+}
+
+// Proto to be written in its entirety to the debug info log.
+message GetCrashInfoResponse {
+  // Hash of the crashing call stack.
+  optional string stack_id = 1;
+
+  // Time of the crash, potentially rounded to remove
+  // significant bits.
+  optional int64 crash_time_millis = 2;
+}
+
 message CommitResponse {
   enum ResponseType {
     SUCCESS = 1;
@@ -836,8 +862,7 @@ message ClientToServerResponse {
 
   optional ClientCommand client_command = 7;
   optional ProfilingData profiling_data = 8;
-  // DEPRECATED - this field was never used in production.
-  // optional ClearUserDataResponse clear_user_data = 9;
+  optional ClearUserDataResponse clear_user_data = 9;
   optional GetUpdatesMetadataResponse stream_metadata = 10;
   // If GetUpdatesStreamingResponse is contained in the ClientToServerResponse,
   // none of the other fields (error_code and etc) will be set.