Make use of v8::TickSample instead of v8::internal::TickSample in logger.

src/profiler/profile-generator.h

Index: src/profiler/profile-generator.h
diff --git a/src/profiler/profile-generator.h b/src/profiler/profile-generator.h
index 35ad314b92688893617345bcf1fcc1190db5b9be..2af1f6583a97f9a03a74bfab27064768211dd9b6 100644
--- a/src/profiler/profile-generator.h
+++ b/src/profiler/profile-generator.h
@@ -12,11 +12,10 @@
 #include "src/profiler/strings-storage.h"
 
 namespace v8 {
+namespace internal {
 
 struct TickSample;
 
-namespace internal {
-
 // Provides a mapping from the offsets within generated code to
 // the source line.
 class JITLineInfoTable : public Malloced {