Add more timing information in the VM to track time spent is dart code Vs native code.

runtime/vm/unit_test.h

Index: runtime/vm/unit_test.h
===================================================================
--- runtime/vm/unit_test.h	(revision 32801)
+++ runtime/vm/unit_test.h	(working copy)
@@ -9,6 +9,7 @@
 
 #include "vm/ast.h"
 #include "vm/dart.h"
+#include "vm/dart_api_impl.h"
 #include "vm/globals.h"
 #include "vm/heap.h"
 #include "vm/isolate.h"
@@ -54,6 +55,7 @@
 #define ASSEMBLER_TEST_RUN(name, test)                                         \
   static void AssemblerTestRun##name(AssemblerTest* test);                     \
   TEST_CASE(name) {                                                            \
+    NativeToVmTimerScope timer(Isolate::Current());                            \
     Assembler __assembler__;                                                   \
     AssemblerTest test(""#name, &__assembler__);                               \
     AssemblerTestGenerate##name(test.assembler());                             \
@@ -77,6 +79,7 @@
 #define CODEGEN_TEST_RUN(name, expected)                                       \
   static void CodeGenTestRun##name(const Function& function);                  \
   TEST_CASE(name) {                                                            \
+    NativeToVmTimerScope timer(Isolate::Current());                            \
     CodeGenTest __test__(""#name);                                             \
     CodeGenTestGenerate##name(&__test__);                                      \
     __test__.Compile();                                                        \
@@ -97,6 +100,7 @@
 #define CODEGEN_TEST_RAW_RUN(name, function)                                   \
   static void CodeGenTestRun##name(const Function& function);                  \
   TEST_CASE(name) {                                                            \
+    NativeToVmTimerScope timer(Isolate::Current());                            \
     CodeGenTest __test__(""#name);                                             \
     CodeGenTestGenerate##name(&__test__);                                      \
     __test__.Compile();                                                        \
@@ -110,6 +114,7 @@
 #define CODEGEN_TEST2_RUN(name1, name2, expected)                              \
   static void CodeGenTestRun##name1(const Function& function);                 \
   TEST_CASE(name1) {                                                           \
+    NativeToVmTimerScope timer(Isolate::Current());                            \
     /* Generate code for name2 */                                              \
     CodeGenTest __test2__(""#name2);                                           \
     CodeGenTestGenerate##name2(&__test2__);                                    \