Fix more MUST_USE_RESULT warnings.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 761 matching lines @@
   // We just initialized the VM, no heap allocation failure yet.
   JSArray::Initialize(array, 0);
 
   // Set array length to 0.
   *JSArray::SetElementsLength(array, handle(Smi::FromInt(0), isolate));
   CHECK_EQ(Smi::FromInt(0), array->length());
   // Must be in fast mode.
   CHECK(array->HasFastSmiOrObjectElements());
 
   // array[length] = name.
-  JSReceiver::SetElement(array, 0, name, NONE, SLOPPY);
+  JSReceiver::SetElement(array, 0, name, NONE, SLOPPY).Check();
   CHECK_EQ(Smi::FromInt(1), array->length());
   CHECK_EQ(*i::Object::GetElement(isolate, array, 0), *name);
 
   // Set array length with larger than smi value.
   Handle<Object> length =
       factory->NewNumberFromUint(static_cast<uint32_t>(Smi::kMaxValue) + 1);
   *JSArray::SetElementsLength(array, length);
 
   uint32_t int_length = 0;
   CHECK(length->ToArrayIndex(&int_length));
   CHECK_EQ(*length, array->length());
   CHECK(array->HasDictionaryElements());  // Must be in slow mode.
 
   // array[length] = name.
-  JSReceiver::SetElement(array, int_length, name, NONE, SLOPPY);
+  JSReceiver::SetElement(array, int_length, name, NONE, SLOPPY).Check();
   uint32_t new_int_length = 0;
   CHECK(array->length()->ToArrayIndex(&new_int_length));
   CHECK_EQ(static_cast<double>(int_length), new_int_length - 1);
   CHECK_EQ(*i::Object::GetElement(isolate, array, int_length), *name);
   CHECK_EQ(*i::Object::GetElement(isolate, array, 0), *name);
 }
 
 
 TEST(JSObjectCopy) {
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   Factory* factory = isolate->factory();
 
   v8::HandleScope sc(CcTest::isolate());
   String* object_string = String::cast(CcTest::heap()->Object_string());
   Object* raw_object = CcTest::i_isolate()->context()->global_object()->
       GetProperty(object_string)->ToObjectChecked();
   JSFunction* object_function = JSFunction::cast(raw_object);
   Handle<JSFunction> constructor(object_function);
   Handle<JSObject> obj = factory->NewJSObject(constructor);
   Handle<String> first = factory->InternalizeUtf8String("first");
   Handle<String> second = factory->InternalizeUtf8String("second");
 
   Handle<Smi> one(Smi::FromInt(1), isolate);
   Handle<Smi> two(Smi::FromInt(2), isolate);
 
   JSReceiver::SetProperty(obj, first, one, NONE, SLOPPY).Check();
   JSReceiver::SetProperty(obj, second, two, NONE, SLOPPY).Check();
 
-  JSReceiver::SetElement(obj, 0, first, NONE, SLOPPY);
-  JSReceiver::SetElement(obj, 1, second, NONE, SLOPPY);
+  JSReceiver::SetElement(obj, 0, first, NONE, SLOPPY).Check();
+  JSReceiver::SetElement(obj, 1, second, NONE, SLOPPY).Check();
 
   // Make the clone.
   Handle<JSObject> clone = JSObject::Copy(obj);
   CHECK(!clone.is_identical_to(obj));
 
   CHECK_EQ(*i::Object::GetElement(isolate, obj, 0),
            *i::Object::GetElement(isolate, clone, 0));
   CHECK_EQ(*i::Object::GetElement(isolate, obj, 1),
            *i::Object::GetElement(isolate, clone, 1));
 
   CHECK_EQ(obj->GetProperty(*first), clone->GetProperty(*first));
   CHECK_EQ(obj->GetProperty(*second), clone->GetProperty(*second));
 
   // Flip the values.
   JSReceiver::SetProperty(clone, first, two, NONE, SLOPPY).Check();
   JSReceiver::SetProperty(clone, second, one, NONE, SLOPPY).Check();
 
-  JSReceiver::SetElement(clone, 0, second, NONE, SLOPPY);
-  JSReceiver::SetElement(clone, 1, first, NONE, SLOPPY);
+  JSReceiver::SetElement(clone, 0, second, NONE, SLOPPY).Check();
+  JSReceiver::SetElement(clone, 1, first, NONE, SLOPPY).Check();
 
   CHECK_EQ(*i::Object::GetElement(isolate, obj, 1),
            *i::Object::GetElement(isolate, clone, 0));
   CHECK_EQ(*i::Object::GetElement(isolate, obj, 0),
            *i::Object::GetElement(isolate, clone, 1));
 
   CHECK_EQ(obj->GetProperty(*second), clone->GetProperty(*first));
   CHECK_EQ(obj->GetProperty(*first), clone->GetProperty(*second));
 }
 
@@ skipping 3079 matching lines @@
   v8::Context::Scope cscope(context);
 
   v8::Local<v8::Value> result = CompileRun(
       "var locals = '';"
       "for (var i = 0; i < 512; i++) locals += 'var v' + i + '= 42;';"
       "eval('function f() {' + locals + 'return function() { return v0; }; }');"
       "interrupt();"  // This triggers a fake stack overflow in f.
       "f()()");
   CHECK_EQ(42.0, result->ToNumber()->Value());
 }