Use StringBuilder::appendLiteral() / StringBuilder::append(char) when possible

Source/modules/filesystem/DOMFileSystem.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 49 matching lines @@
     return fileSystem;
 }
 
 DOMFileSystem* DOMFileSystem::createIsolatedFileSystem(ExecutionContext* context, const String& filesystemId)
 {
     if (filesystemId.isEmpty())
         return 0;
 
     StringBuilder filesystemName;
     filesystemName.append(createDatabaseIdentifierFromSecurityOrigin(context->securityOrigin()));
-    filesystemName.append(":Isolated_");
+    filesystemName.appendLiteral(":Isolated_");
     filesystemName.append(filesystemId);
 
     // The rootURL created here is going to be attached to each filesystem request and
     // is to be validated each time the request is being handled.
     StringBuilder rootURL;
-    rootURL.append("filesystem:");
+    rootURL.appendLiteral("filesystem:");
     rootURL.append(context->securityOrigin()->toString());
-    rootURL.append("/");
+    rootURL.append('/');
     rootURL.append(isolatedPathPrefix);
-    rootURL.append("/");
+    rootURL.append('/');
     rootURL.append(filesystemId);
-    rootURL.append("/");
+    rootURL.append('/');
 
     return DOMFileSystem::create(context, filesystemName.toString(), FileSystemTypeIsolated, KURL(ParsedURLString, rootURL.toString()));
 }
 
 DOMFileSystem::DOMFileSystem(ExecutionContext* context, const String& name, FileSystemType type, const KURL& rootURL)
     : DOMFileSystemBase(context, name, type, rootURL)
     , ActiveDOMObject(context)
     , m_numberOfPendingCallbacks(0)
 {
     ScriptWrappable::init(this);
@@ skipping 69 matching lines @@
     KURL fileSystemURL = createFileSystemURL(fileEntry);
     if (!fileSystem()) {
         reportError(errorCallback, FileError::create(FileError::ABORT_ERR));
         return;
     }
 
     fileSystem()->createSnapshotFileAndReadMetadata(fileSystemURL, SnapshotFileCallback::create(this, fileEntry->name(), fileSystemURL, successCallback, errorCallback, m_context));
 }
 
 } // namespace blink