Expose TickSample and its APIs in v8-profiler.h

src/profiler/profile-generator.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_PROFILER_PROFILE_GENERATOR_H_
 #define V8_PROFILER_PROFILE_GENERATOR_H_
 
 #include <map>
-#include "include/v8-profiler.h"
 #include "src/allocation.h"
 #include "src/base/hashmap.h"
 #include "src/compiler.h"
 #include "src/profiler/strings-storage.h"
 
 namespace v8 {
+
+struct TickSample;
+
 namespace internal {
 
 // Provides a mapping from the offsets within generated code to
 // the source line.
 class JITLineInfoTable : public Malloced {
  public:
   JITLineInfoTable();
   ~JITLineInfoTable();
 
   void SetPosition(int pc_offset, int line);
@@ skipping 352 matching lines @@
   CodeMap code_map_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileGenerator);
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PROFILER_PROFILE_GENERATOR_H_