Allow component-updated Flash to override the placeholder fake Flash even if the version is lower.

chrome/browser/component_updater/pepper_flash_component_installer.cc

 // Copyright (c) 2013 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.
 
 #include "chrome/browser/component_updater/pepper_flash_component_installer.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 10 matching lines @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/version.h"
 #include "build/build_config.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/common/chrome_constants.h"
+#include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pepper_flash.h"
 #include "chrome/common/ppapi_utils.h"
 #include "components/component_updater/component_updater_service.h"
 #include "components/component_updater/default_component_installer.h"
 #include "components/update_client/update_client.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/plugin_service.h"
 #include "content/public/common/content_constants.h"
@@ skipping 65 matching lines @@
   content::PepperPluginInfo plugin_info;
   if (!MakePepperFlashPluginInfo(path, version, true, &plugin_info))
     return;
   content::WebPluginInfo web_plugin = plugin_info.ToWebPluginInfo();
 
   base::FilePath system_flash_path;
   PathService::Get(chrome::FILE_PEPPER_FLASH_SYSTEM_PLUGIN, &system_flash_path);
 
   std::vector<content::WebPluginInfo> plugins;
   PluginService::GetInstance()->GetInternalPlugins(&plugins);
+  base::FilePath placeholder_path =
+      base::FilePath::FromUTF8Unsafe(ChromeContentClient::kNotPresent);
   for (const auto& plugin : plugins) {
     if (!plugin.is_pepper_plugin() || plugin.name != web_plugin.name)
       continue;
 
+    if (plugin.path == placeholder_path) {
+      // This is the Flash placeholder; replace it regardless of version or
+      // other considerations.
+      PluginService::GetInstance()->UnregisterInternalPlugin(plugin.path);
+      break;
+    }
+
     Version registered_version(base::UTF16ToUTF8(plugin.version));
 
     // If lower version, never register.
     if (registered_version.IsValid() &&
         version.CompareTo(registered_version) < 0) {
       return;
     }
 
     bool registered_is_debug_system =
         !system_flash_path.empty() &&
@@ skipping 145 matching lines @@
   std::unique_ptr<ComponentInstallerTraits> traits(
       new FlashComponentInstallerTraits);
   // |cus| will take ownership of |installer| during installer->Register(cus).
   DefaultComponentInstaller* installer =
       new DefaultComponentInstaller(std::move(traits));
   installer->Register(cus, base::Closure());
 #endif  // defined(GOOGLE_CHROME_BUILD)
 }
 
 }  // namespace component_updater