Always use ENABLE_PLUGINS to indicate plugins support.

chrome/common/chrome_content_client.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_content_client.h"
 
 #if defined(OS_LINUX)
 #include <fcntl.h>
 #endif  // defined(OS_LINUX)
 
@@ skipping 79 matching lines @@
 content::PepperPluginInfo::PPP_InitializeModuleFunc g_nacl_initialize_module;
 content::PepperPluginInfo::PPP_ShutdownModuleFunc g_nacl_shutdown_module;
 #endif
 
 // Appends the known built-in plugins to the given vector. Some built-in
 // plugins are "internal" which means they are compiled into the Chrome binary,
 // and some are extra shared libraries distributed with the browser (these are
 // not marked internal, aside from being automatically registered, they're just
 // regular plugins).
 void ComputeBuiltInPlugins(std::vector<content::PepperPluginInfo>* plugins) {
+#if !defined(OS_ANDROID)
   content::PepperPluginInfo pdf_info;
   pdf_info.is_internal = true;
   pdf_info.is_out_of_process = true;
   pdf_info.name = ChromeContentClient::kPDFPluginName;
   pdf_info.description = kPDFPluginDescription;
   pdf_info.path = base::FilePath::FromUTF8Unsafe(
       ChromeContentClient::kPDFPluginPath);
   content::WebPluginMimeType pdf_mime_type(
       kPDFPluginOutOfProcessMimeType,
       kPDFPluginExtension,
       kPDFPluginDescription);
   pdf_info.mime_types.push_back(pdf_mime_type);
   pdf_info.internal_entry_points.get_interface = g_pdf_get_interface;
   pdf_info.internal_entry_points.initialize_module = g_pdf_initialize_module;
   pdf_info.internal_entry_points.shutdown_module = g_pdf_shutdown_module;
   pdf_info.permissions = kPDFPluginPermissions;
   plugins->push_back(pdf_info);
+#endif  // !defined(OS_ANDROID)
 
   base::FilePath path;
 
 #if !defined(DISABLE_NACL)
   // Handle Native Client just like the PDF plugin. This means that it is
   // enabled by default for the non-portable case.  This allows apps installed
   // from the Chrome Web Store to use NaCl even if the command line switch
   // isn't set.  For other uses of NaCl we check for the command line switch.
   if (PathService::Get(chrome::FILE_NACL_PLUGIN, &path)) {
     content::PepperPluginInfo nacl;
@@ skipping 472 matching lines @@
   schemes->insert(content::kChromeUIScheme);
   schemes->insert(extensions::kExtensionScheme);
   schemes->insert(extensions::kExtensionResourceScheme);
   GetSecureOriginWhitelist(origins);
 }
 
 void ChromeContentClient::AddServiceWorkerSchemes(
     std::set<std::string>* schemes) {
   schemes->insert(extensions::kExtensionScheme);
 }