Move ".crx"/".pem" constants and extension_filenames constants into extensions/common/constants.cc.

chrome/utility/extensions/unpacker.cc

Index: chrome/utility/extensions/unpacker.cc
diff --git a/chrome/utility/extensions/unpacker.cc b/chrome/utility/extensions/unpacker.cc
index 4ae8853143da96f0c78b85134e608237fe1e81ae..fddd1585f875fb2a830d86a1f48d35f8d7eaa89a 100644
--- a/chrome/utility/extensions/unpacker.cc
+++ b/chrome/utility/extensions/unpacker.cc
@@ -37,7 +37,6 @@
 
 namespace errors = extension_manifest_errors;
 namespace keys = extension_manifest_keys;
-namespace filenames = extension_filenames;
 
 namespace {
 
@@ -109,7 +108,7 @@ Unpacker::~Unpacker() {
 
 base::DictionaryValue* Unpacker::ReadManifest() {
   base::FilePath manifest_path =
-      temp_install_dir_.Append(kManifestFilename);
+      temp_install_dir_.Append(filenames::kManifestFilename);
   if (!base::PathExists(manifest_path)) {
     SetError(errors::kInvalidManifest);
     return NULL;
@@ -133,7 +132,7 @@ base::DictionaryValue* Unpacker::ReadManifest() {
 
 bool Unpacker::ReadAllMessageCatalogs(const std::string& default_locale) {
   base::FilePath locales_path =
-    temp_install_dir_.Append(kLocaleFolder);
+      temp_install_dir_.Append(filenames::kLocaleFolder);
 
   // Not all folders under _locales have to be valid locales.
   base::FileEnumerator locales(locales_path,
@@ -148,7 +147,8 @@ bool Unpacker::ReadAllMessageCatalogs(const std::string& default_locale) {
                                                   all_locales))
       continue;
 
-    base::FilePath messages_path = locale_path.Append(kMessagesFilename);
+    base::FilePath messages_path =
+        locale_path.Append(filenames::kMessagesFilename);
 
     if (!ReadMessageCatalog(messages_path))
       return false;