Add a PDF component extension

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 <map>
 #include <string>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/json/json_string_value_serializer.h"
 #include "base/metrics/field_trial.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_change_registrar.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/extension_file_util.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
+#include "content/public/browser/plugin_service.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/id_util.h"
 #include "extensions/common/manifest_constants.h"
 #include "grit/browser_resources.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 
 #if defined(USE_AURA)
 #include "grit/keyboard_resources.h"
@@ skipping 517 matching lines @@
     Add(IDR_GOOGLE_NOW_MANIFEST,
         base::FilePath(FILE_PATH_LITERAL("google_now")));
   }
 #endif
 
 #if defined(GOOGLE_CHROME_BUILD)
 #if !defined(OS_CHROMEOS)  // http://crbug.com/314799
   AddNetworkSpeechSynthesisExtension();
 #endif
 #endif  // defined(GOOGLE_CHROME_BUILD)
+
+  base::FilePath pdf_path;
+  content::PluginService* plugin_service =
+      content::PluginService::GetInstance();
+  PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_path);

[tapted, 2013/12/05 03:34:37]

nit: maybe include this in the `if` condition, so the return value gets checked.

+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kOutOfProcessPdf) &&
+      plugin_service->GetRegisteredPpapiPluginInfo(pdf_path)) {
+    Add(IDR_PDF_MANIFEST, base::FilePath(FILE_PATH_LITERAL("pdf")));
+  }
 }
 
 void ComponentLoader::UnloadComponent(ComponentExtensionInfo* component) {
   delete component->manifest;
   if (extension_service_->is_ready()) {
     extension_service_->
         RemoveComponentExtension(component->extension_id);
   }
 }
 
 }  // namespace extensions