Make FastNewFunctionContextStub take slots parameter

src/crankshaft/arm/lithium-codegen-arm.cc

Index: src/crankshaft/arm/lithium-codegen-arm.cc
diff --git a/src/crankshaft/arm/lithium-codegen-arm.cc b/src/crankshaft/arm/lithium-codegen-arm.cc
index 11b2f6dc28201e7f6d04bbca2abbb561cfa8a333..915ccf696a760e0039a11582f70234df6652be17 100644
--- a/src/crankshaft/arm/lithium-codegen-arm.cc
+++ b/src/crankshaft/arm/lithium-codegen-arm.cc
@@ -166,14 +166,12 @@ void LCodeGen::DoPrologue(LPrologue* instr) {
       __ Push(info()->scope()->GetScopeInfo(info()->isolate()));
       __ CallRuntime(Runtime::kNewScriptContext);
       deopt_mode = Safepoint::kLazyDeopt;
-    } else if (slots <= FastNewFunctionContextStub::kMaximumSlots) {
-      FastNewFunctionContextStub stub(isolate(), slots);
+    } else {
+      FastNewFunctionContextStub stub(isolate());
+      __ mov(FastNewFunctionContextDescriptor::SlotsRegister(), Operand(slots));
       __ CallStub(&stub);
       // Result of FastNewFunctionContextStub is always in new space.
       need_write_barrier = false;
-    } else {
-      __ push(r1);
-      __ CallRuntime(Runtime::kNewFunctionContext);
     }
     RecordSafepoint(deopt_mode);