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

chrome/browser/extensions/sandboxed_unpacker.cc

Index: chrome/browser/extensions/sandboxed_unpacker.cc
diff --git a/chrome/browser/extensions/sandboxed_unpacker.cc b/chrome/browser/extensions/sandboxed_unpacker.cc
index cb40debb2e3e8a340a7292c9cb1d1e3cedc5ce9e..c59af568fac69cc2fd89c545674e339936af8ae3 100644
--- a/chrome/browser/extensions/sandboxed_unpacker.cc
+++ b/chrome/browser/extensions/sandboxed_unpacker.cc
@@ -182,7 +182,7 @@ bool FindWritableTempLocation(const base::FilePath& extensions_dir,
 bool ReadImagesFromFile(const base::FilePath& extension_path,
                         DecodedImages* images) {
   base::FilePath path =
-      extension_path.AppendASCII(extension_filenames::kDecodedImagesFilename);
+      extension_path.AppendASCII(filenames::kDecodedImagesFilename);
   std::string file_str;
   if (!file_util::ReadFileToString(path, &file_str))
     return false;
@@ -198,7 +198,7 @@ bool ReadImagesFromFile(const base::FilePath& extension_path,
 bool ReadMessageCatalogsFromFile(const base::FilePath& extension_path,
                                  base::DictionaryValue* catalogs) {
   base::FilePath path = extension_path.AppendASCII(
-      extension_filenames::kDecodedMessageCatalogsFilename);
+      filenames::kDecodedMessageCatalogsFilename);
   std::string file_str;
   if (!file_util::ReadFileToString(path, &file_str))
     return false;
@@ -264,8 +264,7 @@ void SandboxedUnpacker::Start() {
     return;  // ReportFailure() already called.
 
   // Initialize the path that will eventually contain the unpacked extension.
-  extension_root_ = temp_dir_.path().AppendASCII(
-      extension_filenames::kTempExtensionName);
+  extension_root_ = temp_dir_.path().AppendASCII(filenames::kTempExtensionName);
   PATH_LENGTH_HISTOGRAM("Extensions.SandboxUnpackUnpackedCrxPathLength",
                         extension_root_);
 
@@ -625,7 +624,7 @@ DictionaryValue* SandboxedUnpacker::RewriteManifestFile(
   }
 
   base::FilePath manifest_path =
-      extension_root_.Append(kManifestFilename);
+      extension_root_.Append(filenames::kManifestFilename);
   if (!file_util::WriteFile(manifest_path,
                             manifest_json.data(), manifest_json.size())) {
     // Error saving manifest.json.
@@ -782,7 +781,7 @@ bool SandboxedUnpacker::RewriteCatalogFiles() {
     // hack and remove the corresponding #include.
     base::FilePath relative_path =
         base::FilePath::FromWStringHack(UTF8ToWide(it.key()));
-    relative_path = relative_path.Append(kMessagesFilename);
+    relative_path = relative_path.Append(filenames::kMessagesFilename);
     if (relative_path.IsAbsolute() || relative_path.ReferencesParent()) {
       // Invalid path for catalog.
       ReportFailure(