Expose TickSample and its APIs in v8-profiler.h

src/profiler/cpu-profiler.h

 // Copyright 2012 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_CPU_PROFILER_H_
 #define V8_PROFILER_CPU_PROFILER_H_
 
 #include <memory>
 
 #include "src/allocation.h"
@@ skipping 10 matching lines @@
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class CodeEntry;
 class CodeMap;
 class CpuProfile;
 class CpuProfilesCollection;
 class ProfileGenerator;
+struct TickSample;
 
 #define CODE_EVENTS_TYPE_LIST(V)                         \
   V(CODE_CREATION, CodeCreateEventRecord)                \
   V(CODE_MOVE, CodeMoveEventRecord)                      \
   V(CODE_DISABLE_OPT, CodeDisableOptEventRecord)         \
   V(CODE_DEOPT, CodeDeoptEventRecord)                    \
   V(REPORT_BUILTIN, ReportBuiltinEventRecord)
 
 
 class CodeEventRecord {
@@ skipping 194 matching lines @@
   bool is_profiling_;
 
   DISALLOW_COPY_AND_ASSIGN(CpuProfiler);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 
 #endif  // V8_PROFILER_CPU_PROFILER_H_