[stubs] Simplify the non-function case of CallConstructStub.

src/full-codegen/arm/full-codegen-arm.cc

Index: src/full-codegen/arm/full-codegen-arm.cc
diff --git a/src/full-codegen/arm/full-codegen-arm.cc b/src/full-codegen/arm/full-codegen-arm.cc
index a29ff82e166506cb7cb87c56544f2df18fb9c55c..7c7ec9f1b4b70dee50adcabbf0365fec08706ff3 100644
--- a/src/full-codegen/arm/full-codegen-arm.cc
+++ b/src/full-codegen/arm/full-codegen-arm.cc
@@ -3203,6 +3203,8 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
   CallConstructStub stub(isolate(), RECORD_CONSTRUCTOR_TARGET);
   __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
   PrepareForBailoutForId(expr->ReturnId(), TOS_REG);
+  // Restore context register.
+  __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->Plug(r0);
 }
 
@@ -3252,6 +3254,8 @@ void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
 
   RecordJSReturnSite(expr);
 
+  // Restore context register.
+  __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
   context()->Plug(r0);
 }
 
@@ -4154,9 +4158,10 @@ void FullCodeGenerator::EmitDefaultConstructorCallSuper(CallRuntime* expr) {
   CallConstructStub stub(isolate(), SUPER_CONSTRUCTOR_CALL);
   __ Call(stub.GetCode(), RelocInfo::CONSTRUCT_CALL);
 
-  __ Drop(1);
+  // Restore context register.
+  __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
 
-  context()->Plug(result_register());
+  context()->DropAndPlug(1, r0);
 }