Plugins: Remove Shadow DOM Plugin Placeholder

chrome/common/chrome_switches.cc

 // 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.
 
 #include "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 
 namespace switches {
@@ skipping 462 matching lines @@
 // Only auto-reload error pages when the tab is visible.
 const char kEnableOfflineAutoReloadVisibleOnly[] =
     "enable-offline-auto-reload-visible-only";
 
 // Enables panels (always on-top docked pop-up windows).
 const char kEnablePanels[]                  = "enable-panels";
 
 // Enable the new material UI - requires out of process PDF plugin.
 const char kEnablePdfMaterialUI[]           = "enable-pdf-material-ui";
 
-// Enables presenting plugin placeholder content as shadow DOM.
-const char kEnablePluginPlaceholderShadowDom[] =
-    "enable-plugin-placeholder-shadow-dom";
-
 // Enables a number of potentially annoying security features (strict mixed
 // content mode, powerful feature restrictions, etc.)
 const char kEnablePotentiallyAnnoyingSecurityFeatures[] =
     "enable-potentially-annoying-security-features";
 
 // Enables the Power overlay in Settings.
 const char kEnablePowerOverlay[]            = "enable-power-overlay";
 
 // Enables showing unregistered printers in print preview
 const char kEnablePrintPreviewRegisterPromos[] =
@@ skipping 925 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR CRAP TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches