Revert of Combine PDF plugin into the Chromium binary.

chrome/browser/extensions/component_loader.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/extensions/component_loader.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ skipping 608 matching lines @@
 #endif
 
 #if defined(GOOGLE_CHROME_BUILD)
 #if !defined(OS_CHROMEOS)  // http://crbug.com/314799
   AddNetworkSpeechSynthesisExtension();
 #endif
 
 #endif  // defined(GOOGLE_CHROME_BUILD)
 
 #if defined(ENABLE_PLUGINS)
-  if (switches::OutOfProcessPdfEnabled()) {
+  base::FilePath pdf_path;
+  content::PluginService* plugin_service =
+      content::PluginService::GetInstance();
+  if (switches::OutOfProcessPdfEnabled() &&
+      PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_path) &&
+      plugin_service->GetRegisteredPpapiPluginInfo(pdf_path)) {
     if (switches::PdfMaterialUIEnabled())
       Add(IDR_PDF_MANIFEST_MATERIAL, base::FilePath(FILE_PATH_LITERAL("pdf")));
     else
       Add(IDR_PDF_MANIFEST, base::FilePath(FILE_PATH_LITERAL("pdf")));
   }
 #endif
 
   Add(IDR_CRYPTOTOKEN_MANIFEST,
       base::FilePath(FILE_PATH_LITERAL("cryptotoken")));
 }
@@ skipping 20 matching lines @@
         off_the_record_context, Extension::GetBaseURLFromExtensionId(id));
     storage::FileSystemContext* file_system_context =
         content::BrowserContext::GetStoragePartitionForSite(
             off_the_record_context, site)->GetFileSystemContext();
     file_system_context->EnableTemporaryFileSystemInIncognito();
   }
 #endif
 }
 
 }  // namespace extensions