[inspector] change implementation file extension from cpp to cc

src/inspector/string-16.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/inspector/String16.h"
-
+#include "src/inspector/string-16.h"
 #include "src/base/platform/platform.h"
-#include "src/inspector/ProtocolPlatform.h"
+#include "src/inspector/protocol-platform.h"
 
 #include <algorithm>
 #include <cctype>
 #include <cstdlib>
 #include <cstring>
 #include <locale>
 #include <string>
 
 namespace v8_inspector {
 
@@ skipping 482 matching lines @@
     // There should be room left, since one UChar hasn't been
     // converted.
     DCHECK((buffer + 3) <= (buffer + bufferVector.size()));
     putUTF8Triple(buffer, *characters);
   }
 
   return std::string(bufferVector.data(), buffer - bufferVector.data());
 }
 
 }  // namespace v8_inspector