[Isolates] Make lint happy.

src/scanner.h

 // Copyright 2010 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 85 matching lines @@
   SafeStringInputBuffer safe_string_input_buffer_;
 };
 
 // ----------------------------------------------------------------------------
 // V8JavaScriptScanner
 // JavaScript scanner getting its input from either a V8 String or a unicode
 // CharacterStream.
 
 class V8JavaScriptScanner : public JavaScriptScanner {
  public:
-  V8JavaScriptScanner(Isolate* isolate)
+  explicit V8JavaScriptScanner(Isolate* isolate)
       : JavaScriptScanner(isolate->scanner_constants()) {}
 
   // Initialize the Scanner to scan source.
   void Initialize(Handle<String> source, int literal_flags = kAllLiterals);
   void Initialize(Handle<String> source,
                   unibrow::CharacterStream* stream,
                   int literal_flags = kAllLiterals);
   void Initialize(Handle<String> source,
                   int start_position, int end_position,
                   int literal_flags = kAllLiterals);
@@ skipping 93 matching lines @@
 
 
 template <typename StringType, typename CharType>
 void ExternalStringUTF16Buffer<StringType, CharType>::SeekForward(int pos) {
   pos_ = pos;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCANNER_H_