Implemented the rest of loading/parsing logic for extension i18n:...

chrome/common/extensions/extension.cc

Index: chrome/common/extensions/extension.cc
===================================================================
--- chrome/common/extensions/extension.cc	(revision 25781)
+++ chrome/common/extensions/extension.cc	(working copy)
@@ -615,17 +615,27 @@
     return false;
   }
 
-  // Initialize name.
+  // Initialize & localize name.
   if (!source.GetString(keys::kName, &name_)) {
     *error = errors::kInvalidName;
     return false;
+  } else if (message_bundle_.get()) {
+    std::string l10n_name =
+      message_bundle_->GetL10nMessage(ExtensionMessageBundle::kExtensionName);
+    if (!l10n_name.empty())
+      name_ = l10n_name;
   }
 
-  // Initialize description (if present).
+  // Initialize & localize description (if present).
   if (source.HasKey(keys::kDescription)) {
     if (!source.GetString(keys::kDescription, &description_)) {
       *error = errors::kInvalidDescription;
       return false;
+    } else if (message_bundle_.get()) {
+      std::string l10n_description = message_bundle_->GetL10nMessage(
+          ExtensionMessageBundle::kExtensionDescription);
+      if (!l10n_description.empty())
+        description_ = l10n_description;
     }
   }
 
@@ -986,18 +996,6 @@
     }
   }
 
-  // Initialize default locale (if present).
-  if (source.HasKey(keys::kDefaultLocale)) {
-    std::string default_locale;
-    if (!source.GetString(keys::kDefaultLocale, &default_locale)) {
-      *error = errors::kInvalidDefaultLocale;
-      return false;
-    }
-    // Normalize underscores to hyphens.
-    std::replace(default_locale.begin(), default_locale.end(), '_', '-');
-    set_default_locale(default_locale);
-  }
-
   // Chrome URL overrides (optional)
   if (source.HasKey(keys::kChromeURLOverrides)) {
     DictionaryValue* overrides;