Always use ENABLE_PLUGINS to indicate plugins support.

chrome/browser/ui/webui/chrome_web_ui_controller_factory.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/browser/ui/webui/chrome_web_ui_controller_factory.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 365 matching lines @@
     return &NewWebUI<AppLauncherPageUI>;
   }
 #endif
 
   // Bookmarks are part of NTP on Android.
   if (url.host() == chrome::kChromeUIBookmarksHost)
     return &NewWebUI<BookmarksUI>;
   // Downloads list on Android uses the built-in download manager.
   if (url.host() == chrome::kChromeUIDownloadsHost)
     return &NewWebUI<DownloadsUI>;
-  // Flash is not available on android.
-  if (url.host() == chrome::kChromeUIFlashHost)
-    return &NewWebUI<FlashUI>;
   if (url.host() == chrome::kChromeUIGCMInternalsHost)
     return &NewWebUI<GCMInternalsUI>;
   // Help is implemented with native UI elements on Android.
   if (url.host() == chrome::kChromeUIHelpFrameHost)
     return &NewWebUI<HelpUI>;
   // Identity API is not available on Android.
   if (url.host() == chrome::kChromeUIIdentityInternalsHost)
     return &NewWebUI<IdentityInternalsUI>;
   if (url.host() == chrome::kChromeUINewTabHost)
     return &NewWebUI<NewTabUI>;
   if (url.host() == chrome::kChromeUIMdSettingsHost &&
       ::switches::MdSettingsEnabled()) {
     return &NewWebUI<settings::MdSettingsUI>;
   }
-  // Android does not support plugins for now.
-  if (url.host() == chrome::kChromeUIPluginsHost)
-    return &NewWebUI<PluginsUI>;
   if (url.host() == chrome::kChromeUIQuotaInternalsHost)
     return &NewWebUI<QuotaInternalsUI>;
   // Settings are implemented with native UI elements on Android.
   // Handle chrome://settings if settings in a window and about in settings
   // are enabled.
   if (url.host() == chrome::kChromeUISettingsFrameHost ||
       (url.host() == chrome::kChromeUISettingsHost &&
        ::switches::AboutInSettingsEnabled())) {
     return &NewWebUI<options::OptionsUI>;
   }
@@ skipping 125 matching lines @@
 #endif  // defined(ENABLE_CONFIGURATION_POLICY)
 
 #if defined(ENABLE_APP_LIST)
   if (url.host() == chrome::kChromeUIAppListStartPageHost)
     return &NewWebUI<app_list::StartPageUI>;
 #endif
 #if defined(ENABLE_EXTENSIONS)
   if (url.host() == chrome::kChromeUIExtensionsFrameHost)
     return &NewWebUI<extensions::ExtensionsUI>;
 #endif
+#if defined(ENABLE_PLUGINS)
+  if (url.host() == chrome::kChromeUIFlashHost)
+    return &NewWebUI<FlashUI>;
+  if (url.host() == chrome::kChromeUIPluginsHost)
+    return &NewWebUI<PluginsUI>;
+#endif
 #if defined(ENABLE_PRINT_PREVIEW)
   if (url.host() == chrome::kChromeUIPrintHost &&
       !profile->GetPrefs()->GetBoolean(prefs::kPrintPreviewDisabled)) {
     return &NewWebUI<PrintPreviewUI>;
   }
 #endif
 #if defined(ENABLE_SERVICE_DISCOVERY)
   if (url.host() == chrome::kChromeUIDevicesHost) {
     return &NewWebUI<LocalDiscoveryUI>;
   }
@@ skipping 202 matching lines @@
 #endif
 
   // Android doesn't use the plugins pages.
   if (page_url.host() == chrome::kChromeUIPluginsHost)
     return PluginsUI::GetFaviconResourceBytes(scale_factor);
 
 #endif
 
   return NULL;
 }