Do not replace up-to-date System Flash with Component Flash.

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 111 matching lines @@
 
     if (plugin.path == placeholder_path) {
       // This is the Flash placeholder; replace it regardless of version or
       // other considerations.
       PluginService::GetInstance()->UnregisterInternalPlugin(plugin.path);
       break;
     }
 
     base::Version registered_version(base::UTF16ToUTF8(plugin.version));
 
-    // If lower version, never register.
+    // If lower or equal version, never register.
     if (registered_version.IsValid() &&
-        version.CompareTo(registered_version) < 0) {
+        version.CompareTo(registered_version) <= 0) {
       return;
     }
 
-    bool registered_is_debug_system =
-        !system_flash_path.empty() &&
-        base::FilePath::CompareEqualIgnoreCase(plugin.path.value(),
-                                               system_flash_path.value()) &&
-        chrome::IsSystemFlashScriptDebuggerPresent();
-    bool is_on_network = false;
-#if defined(OS_WIN)
-    // On Windows, component updated DLLs can't load off network drives.
-    // See crbug.com/572131 for details.
-    is_on_network = base::IsOnNetworkDrive(path);
-#endif
-    // If equal version, register iff component is not on a network drive,
-    // and the version of flash is not debug system.
-    if (registered_version.IsValid() &&
-        version.CompareTo(registered_version) == 0 &&
-        (is_on_network || registered_is_debug_system)) {
-      return;
-    }
-
     // If the version is newer, remove the old one first.
     PluginService::GetInstance()->UnregisterInternalPlugin(plugin.path);
     break;
   }
 
   PluginService::GetInstance()->RegisterInternalPlugin(web_plugin, true);
   PluginService::GetInstance()->RefreshPlugins();
 }
 
 void UpdatePathService(const base::FilePath& path) {
@@ skipping 118 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