Add a PDF component extension

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index 4d065c3104e4b9b40a2724b7647ff2b034ba61a8..6a1402bde9076df77ef5649c11255bb2b14dd8f4 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -23,6 +23,7 @@
 #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"
@@ -560,6 +561,15 @@ void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
   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) {