Create an external source for extensions on linux that meets the needs of package managers.

chrome/browser/extensions/external_pref_extension_loader.cc

Index: chrome/browser/extensions/external_pref_extension_loader.cc
diff --git a/chrome/browser/extensions/external_pref_extension_loader.cc b/chrome/browser/extensions/external_pref_extension_loader.cc
index 8e291f150c89e445ccefa11436016957a3a9f6f1..bf26df348f0dd0c56613bf69a9e0aee839f8046b 100644
--- a/chrome/browser/extensions/external_pref_extension_loader.cc
+++ b/chrome/browser/extensions/external_pref_extension_loader.cc
@@ -12,34 +12,12 @@
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/path_service.h"
+#include "chrome/browser/extensions/external_extension_util.h"
 #include "chrome/common/chrome_paths.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
-namespace {
-
-// Caller takes ownership of the returned dictionary.
-DictionaryValue* ExtractPrefs(const FilePath& path,
-                              base::ValueSerializer* serializer) {
-  std::string error_msg;
-  Value* extensions = serializer->Deserialize(NULL, &error_msg);
-  if (!extensions) {
-    LOG(WARNING) << "Unable to deserialize json data: " << error_msg
-                 << " In file " << path.value() << " .";
-  } else {
-    if (!extensions->IsType(Value::TYPE_DICTIONARY)) {
-      LOG(WARNING) << "Expected a JSON dictionary in file "
-                   << path.value() << " .";
-    } else {
-      return static_cast<DictionaryValue*>(extensions);
-    }
-  }
-  return new DictionaryValue;
-}
-
-}  // namespace
-
 ExternalPrefExtensionLoader::ExternalPrefExtensionLoader(int base_path_key,
                                                          Options options)
     : base_path_key_(base_path_key),
@@ -100,8 +78,9 @@ DictionaryValue* ExternalPrefExtensionLoader::ReadJsonPrefsFile() {
   }
 
   JSONFileValueSerializer serializer(json_file);
-  DictionaryValue* parsed_json_prefs = ExtractPrefs(json_file, &serializer);
-  return parsed_json_prefs;
+  DictionaryValue*
+      json_prefs = ExternalExtensionUtil::ExtractPrefs(json_file, &serializer);
+  return json_prefs;
 }
 
 void ExternalPrefExtensionLoader::LoadOnFileThread() {
@@ -134,7 +113,8 @@ ExternalTestingExtensionLoader::ExternalTestingExtensionLoader(
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   JSONStringValueSerializer serializer(json_data);
   FilePath fake_json_path = fake_base_path.AppendASCII("fake.json");
-  testing_prefs_.reset(ExtractPrefs(fake_json_path, &serializer));
+  testing_prefs_.reset(ExternalExtensionUtil::ExtractPrefs(fake_json_path,
+                                                           &serializer));
 }
 
 void ExternalTestingExtensionLoader::StartLoading() {