AllocationProfiler: Inital version of RecordObjectAllocation for hydrogen.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 3fb07bc2c1207b0d912c7784a673d9162c57bda5..5329efa02959805ac644cebf01d27478b20785a7 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -2505,6 +2505,11 @@ LInstruction* LChunkBuilder::DoCallStub(HCallStub* instr) {
 }
 
 
+LInstruction* LChunkBuilder::DoCallExternal(HCallExternal* instr) {
+  return MarkAsCall(new(zone()) LCallExternal(), instr);
+}
+
+
 LInstruction* LChunkBuilder::DoArgumentsObject(HArgumentsObject* instr) {
   // There are no real uses of the arguments object.
   // arguments.length and element access are supported directly on