Add chrome namespace to chrome/common/network_diagnostics.mojom

chrome/common/network_diagnostics.mojom

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-module mojom;
+module chrome.mojom;
 
 import "url/mojo/url.mojom";
 
 interface NetworkDiagnostics {
   RunNetworkDiagnostics(url.mojom.Url failed_url);
 };
 
 interface NetworkDiagnosticsClient {
   // Tells the renderer whether or not there is a local diagnostics service that
   // can be run via calls to NetworkDiagnostics::RunNetworkDiagnostics.
   SetCanShowNetworkDiagnosticsDialog(bool can_show);
 };