include only stuff you need, part 1: ast.h, ast-value-factory.h.

src/crankshaft/hydrogen-osr.h

Index: src/crankshaft/hydrogen-osr.h
diff --git a/src/crankshaft/hydrogen-osr.h b/src/crankshaft/hydrogen-osr.h
index e2cfd3042828cec86520a2f4a671c26217ac551d..0610b4284f2e8cdf495ab7a918e8b4939531759e 100644
--- a/src/crankshaft/hydrogen-osr.h
+++ b/src/crankshaft/hydrogen-osr.h
@@ -5,13 +5,14 @@
 #ifndef V8_CRANKSHAFT_HYDROGEN_OSR_H_
 #define V8_CRANKSHAFT_HYDROGEN_OSR_H_
 
-#include "src/ast/ast.h"
 #include "src/crankshaft/hydrogen.h"
 #include "src/zone.h"
 
 namespace v8 {
 namespace internal {
 
+class IterationStatement;
+
 // Responsible for building graph parts related to OSR and otherwise
 // setting up the graph to do an OSR compile.
 class HOsrBuilder : public ZoneObject {