Remove grab-bag includes of v8.h from everywhere.

src/heap-profiler.cc

Index: src/heap-profiler.cc
diff --git a/src/heap-profiler.cc b/src/heap-profiler.cc
index 68d94ccbd953183801e5cb8c58e265f35e9a785e..6dc18f31841f9f3e9fcc81bfcb14e4b40b1def3a 100644
--- a/src/heap-profiler.cc
+++ b/src/heap-profiler.cc
@@ -2,11 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "src/v8.h"
-
 #include "src/heap-profiler.h"
 
 #include "src/allocation-tracker.h"
+#include "src/api.h"
 #include "src/heap-snapshot-generator-inl.h"
 
 namespace v8 {