Clean up some uses of Failures and MaybeObjects.

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 222 matching lines @@
 TEST(Tagging) {
   CcTest::InitializeVM();
   int request = 24;
   CHECK_EQ(request, static_cast<int>(OBJECT_POINTER_ALIGN(request)));
   CHECK(Smi::FromInt(42)->IsSmi());
   CHECK(Failure::RetryAfterGC(NEW_SPACE)->IsFailure());
   CHECK_EQ(NEW_SPACE,
            Failure::RetryAfterGC(NEW_SPACE)->allocation_space());
   CHECK_EQ(OLD_POINTER_SPACE,
            Failure::RetryAfterGC(OLD_POINTER_SPACE)->allocation_space());
-  CHECK(Failure::Exception()->IsFailure());
   CHECK(Smi::FromInt(Smi::kMinValue)->IsSmi());
   CHECK(Smi::FromInt(Smi::kMaxValue)->IsSmi());
 }
 
 
 TEST(GarbageCollection) {
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   Heap* heap = isolate->heap();
   Factory* factory = isolate->factory();
@@ skipping 3940 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());
 }