Expand WTF::StringView's API to be more like StringPiece.

third_party/WebKit/Source/platform/mhtml/MHTMLArchive.cpp

 /*
  * Copyright (C) 2011 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 121 matching lines @@
     const String& boundary,
     const String& contentID,
     EncodingPolicy encodingPolicy,
     const SerializedResource& resource,
     SharedBuffer& outputBuffer)
 {
     ASSERT(!boundary.isEmpty());
     ASSERT(contentID.isEmpty() || contentID[0] == '<');
 
     StringBuilder stringBuilder;
-    stringBuilder.append("--" + boundary + "\r\n");
+    stringBuilder.append("--");
+    stringBuilder.append(boundary);
+    stringBuilder.append("\r\n");
 
     stringBuilder.appendLiteral("Content-Type: ");
     stringBuilder.append(resource.mimeType);
     stringBuilder.appendLiteral("\r\n");
 
     if (!contentID.isEmpty()) {
         stringBuilder.appendLiteral("Content-ID: ");
         stringBuilder.append(contentID);
         stringBuilder.appendLiteral("\r\n");
     }
 
     const char* contentEncoding = 0;
     if (encodingPolicy == UseBinaryEncoding)
         contentEncoding = binary;
     else if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(resource.mimeType) || MIMETypeRegistry::isSupportedNonImageMIMEType(resource.mimeType))
         contentEncoding = quotedPrintable;
     else
         contentEncoding = base64;
 
     stringBuilder.appendLiteral("Content-Transfer-Encoding: ");
     stringBuilder.append(contentEncoding);
     stringBuilder.appendLiteral("\r\n");
 
     if (!resource.url.protocolIsAbout()) {
         stringBuilder.appendLiteral("Content-Location: ");
-        stringBuilder.append(resource.url);
+        stringBuilder.append(resource.url.getString());
         stringBuilder.appendLiteral("\r\n");
     }
 
     stringBuilder.appendLiteral("\r\n");
 
     CString asciiString = stringBuilder.toString().utf8();
     outputBuffer.append(asciiString.data(), asciiString.length());
 
     if (!strcmp(contentEncoding, binary)) {
         const char* data;
@@ skipping 56 matching lines @@
     return m_subresources.get(url.getString());
 }
 
 DEFINE_TRACE(MHTMLArchive)
 {
     visitor->trace(m_mainResource);
     visitor->trace(m_subresources);
 }
 
 } // namespace blink