Remove grab-bag includes of v8.h from everywhere.

src/string-search.h

 // Copyright 2011 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.
 
 #ifndef V8_STRING_SEARCH_H_
 #define V8_STRING_SEARCH_H_
 
+#include "src/isolate.h"
+#include "src/vector.h"
+
 namespace v8 {
 namespace internal {
 
 
 //---------------------------------------------------------------------
 // String Search object.
 //---------------------------------------------------------------------
 
 // Class holding constants and methods that apply to all string search variants,
 // independently of subject and pattern char size.
@@ skipping 530 matching lines @@
                  Vector<const SubjectChar> subject,
                  Vector<const PatternChar> pattern,
                  int start_index) {
   StringSearch<PatternChar, SubjectChar> search(isolate, pattern);
   return search.Search(subject, start_index);
 }
 
 }}  // namespace v8::internal
 
 #endif  // V8_STRING_SEARCH_H_