Register a fake Flash with chrome://plugins during browser start-up.

chrome/common/chrome_content_client.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 #define CHROME_COMMON_CHROME_CONTENT_CLIENT_H_
 
 #include <memory>
+#include <set>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "build/build_config.h"
 #include "chrome/common/origin_trials/chrome_origin_trial_policy.h"
 #include "content/public/common/content_client.h"
 
 #if defined(ENABLE_PLUGINS)
 #include "content/public/common/pepper_plugin_info.h"
 #endif
 
 #include "url/url_util.h"
 
 // Returns the user agent of Chrome.
 std::string GetUserAgent();
 
 class ChromeContentClient : public content::ContentClient {
  public:
+#if defined(GOOGLE_CHROME_BUILD)
+  static const char kNotPresent[];

[sky, 2016/08/30 03:25:23]

Please add a description of this.

+#endif
   static const char kPDFPluginName[];
   static const char kPDFPluginPath[];
   static const char kRemotingViewerPluginPath[];
 
   ChromeContentClient();
   ~ChromeContentClient() override;
 
   // The methods below are called by child processes to set the function
   // pointers for built-in plugins. We avoid linking these plugins into
   // chrome_common because then on Windows we would ship them twice because of
@@ skipping 60 matching lines @@
 
 #if defined(OS_ANDROID)
   media::MediaClientAndroid* GetMediaClientAndroid() override;
 #endif  // OS_ANDROID
 
  private:
   std::unique_ptr<ChromeOriginTrialPolicy> origin_trial_policy_;
 };
 
 #endif  // CHROME_COMMON_CHROME_CONTENT_CLIENT_H_