Expose TickSample and its APIs in v8-profiler.h

src/profiler/cpu-profiler.h

Index: src/profiler/cpu-profiler.h
diff --git a/src/profiler/cpu-profiler.h b/src/profiler/cpu-profiler.h
index d354aeb0469584ee27bdf94429461e262d51fd8e..c2fd4095bf700ede8ddaa57db41b41c469640156 100644
--- a/src/profiler/cpu-profiler.h
+++ b/src/profiler/cpu-profiler.h
@@ -7,6 +7,7 @@
 
 #include <memory>
 
+#include "include/v8-profiler.h"
 #include "src/allocation.h"
 #include "src/base/atomic-utils.h"
 #include "src/base/atomicops.h"
@@ -17,7 +18,6 @@
 #include "src/locked-queue.h"
 #include "src/profiler/circular-queue.h"
 #include "src/profiler/profiler-listener.h"
-#include "src/profiler/tick-sample.h"
 
 namespace v8 {
 namespace internal {
@@ -110,7 +110,8 @@ class TickSampleEventRecord {
   explicit TickSampleEventRecord(unsigned order) : order(order) { }
 
   unsigned order;
-  TickSample sample;
+  base::TimeTicks timestamp;

[alph, 2016/06/30 21:18:08]

I don't like the timestamp sitting here.
How about inheriting v8::internal::TickSample from v8::TickSample and add the
timestamp ?

[lpy, 2016/06/30 22:51:29]

Done.

+  v8::TickSample sample;
 };
 
 
@@ -152,7 +153,7 @@ class ProfilerEventsProcessor : public base::Thread {
   // queue (because the structure is of fixed width, but usually not all
   // stack frame entries are filled.) This method returns a pointer to the
   // next record of the buffer.
-  inline TickSample* StartTickSample();
+  inline v8::TickSample* StartTickSample();
   inline void FinishTickSample();
 
   // SamplingCircularQueue has stricter alignment requirements than a normal new
@@ -210,7 +211,7 @@ class CpuProfiler : public CodeEventObserver {
   void CodeEventHandler(const CodeEventsContainer& evt_rec) override;
 
   // Invoked from stack sampler (thread or signal handler.)
-  inline TickSample* StartTickSample();
+  inline v8::TickSample* StartTickSample();
   inline void FinishTickSample();
 
   bool is_profiling() const { return is_profiling_; }