Expose TickSample and its APIs in v8-profiler.h

src/profiler/cpu-profiler.cc

Index: src/profiler/cpu-profiler.cc
diff --git a/src/profiler/cpu-profiler.cc b/src/profiler/cpu-profiler.cc
index 42b5fdf31dcfb9c396fe2d09bd79342ce8822188..a516f198b2922bdfc376decb09f685b48ddad2ba 100644
--- a/src/profiler/cpu-profiler.cc
+++ b/src/profiler/cpu-profiler.cc
@@ -12,8 +12,6 @@
 #include "src/profiler/cpu-profiler-inl.h"
 #include "src/vm-state-inl.h"
 
-#include "include/v8-profiler.h"
-
 namespace v8 {
 namespace internal {
 
@@ -49,7 +47,11 @@ void ProfilerEventsProcessor::AddDeoptStack(Isolate* isolate, Address from,
   regs.sp = fp - fp_to_sp_delta;
   regs.fp = fp;
   regs.pc = from;
-  record.sample.Init(isolate, regs, TickSample::kSkipCEntryFrame, false);
+  record.sample.Init(reinterpret_cast<v8::Isolate*>(isolate), regs,
+                     TickSample::kSkipCEntryFrame, false);
+  record.sample.timestamp = record.sample.pc == nullptr

[alph, 2016/07/01 00:38:13]

nit: You can create internal::TickSample::Init and setup timestamp there after
calling v8::TickSample::Init.

[lpy, 2016/07/01 01:00:10]

Done.

+                            ? base::TimeTicks()
+                            : base::TimeTicks::HighResolutionNow();
   ticks_from_vm_buffer_.Enqueue(record);
 }
 
@@ -64,7 +66,11 @@ void ProfilerEventsProcessor::AddCurrentStack(Isolate* isolate,
     regs.fp = frame->fp();
     regs.pc = frame->pc();
   }
-  record.sample.Init(isolate, regs, TickSample::kSkipCEntryFrame, update_stats);
+  record.sample.Init(reinterpret_cast<v8::Isolate*>(isolate), regs,
+                     TickSample::kSkipCEntryFrame, update_stats);
+  record.sample.timestamp = record.sample.pc == nullptr
+                            ? base::TimeTicks()
+                            : base::TimeTicks::HighResolutionNow();
   ticks_from_vm_buffer_.Enqueue(record);
 }