AllocationProfiler: Inital version of RecordObjectAllocation for hydrogen.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 590f47af4a7d7d237d658a07dcf4891e54646cf9..5504dc599d9f446dd12632c50a4a8f7a9a3629df 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -62,6 +62,7 @@ class LCodeGen;
   V(CallNewArray)                               \
   V(CallRuntime)                                \
   V(CallStub)                                   \
+  V(CallExternal)                               \
   V(CheckInstanceType)                          \
   V(CheckMaps)                                  \
   V(CheckMapValue)                              \
@@ -483,6 +484,19 @@ class LCallStub V8_FINAL : public LTemplateInstruction<1, 0, 0> {
 };
 
 
+class LCallExternal V8_FINAL : public LTemplateInstruction<0, 2, 0> {
+ public:
+  LCallExternal() { }
+  DECLARE_CONCRETE_INSTRUCTION(CallExternal, "call-external")
+  DECLARE_HYDROGEN_ACCESSOR(CallExternal)
+
+  int arity() const { return hydrogen()->argument_count(); }
+  ExternalReference external_reference() const {
+    return hydrogen()->external_reference();
+  }
+};
+
+
 class LUnknownOSRValue V8_FINAL : public LTemplateInstruction<1, 0, 0> {
  public:
   virtual bool HasInterestingComment(LCodeGen* gen) const V8_OVERRIDE {