Return Object* instead of MaybeObject* from runtime calls.

src/execution.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "execution.h"
 
 #include "bootstrapper.h"
 #include "codegen.h"
 #include "deoptimizer.h"
 #include "isolate-inl.h"
@@ skipping 36 matching lines @@
   // Entering JavaScript.
   VMState<JS> state(isolate);
   CHECK(AllowJavascriptExecution::IsAllowed(isolate));
   if (!ThrowOnJavascriptExecution::IsAllowed(isolate)) {
     isolate->ThrowIllegalOperation();
     isolate->ReportPendingMessages();
     return MaybeHandle<Object>();
   }
 
   // Placeholder for return value.
-  MaybeObject* value = reinterpret_cast<Object*>(kZapValue);
+  Object* value = NULL;
 
   typedef Object* (*JSEntryFunction)(byte* entry,
                                      Object* function,
                                      Object* receiver,
                                      int argc,
                                      Object*** args);
 
   Handle<Code> code = is_construct
       ? isolate->factory()->js_construct_entry_code()
       : isolate->factory()->js_entry_code();
@@ skipping 866 matching lines @@
     return;
   }
 
   // Notify the debug event listeners. Indicate auto continue if the break was
   // a debug command break.
   isolate->debugger()->OnDebugBreak(isolate->factory()->undefined_value(),
                                     debug_command_only);
 }
 #endif
 
-MaybeObject* Execution::HandleStackGuardInterrupt(Isolate* isolate) {
+Object* Execution::HandleStackGuardInterrupt(Isolate* isolate) {
   StackGuard* stack_guard = isolate->stack_guard();
   if (stack_guard->ShouldPostponeInterrupts()) {
     return isolate->heap()->undefined_value();
   }
 
   if (stack_guard->IsAPIInterrupt()) {
     stack_guard->InvokeInterruptCallback();
     stack_guard->Continue(API_INTERRUPT);
   }
 
@@ skipping 30 matching lines @@
   if (stack_guard->IsInstallCodeRequest()) {
     ASSERT(isolate->concurrent_recompilation_enabled());
     stack_guard->Continue(INSTALL_CODE);
     isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
   }
   isolate->runtime_profiler()->OptimizeNow();
   return isolate->heap()->undefined_value();
 }
 
 } }  // namespace v8::internal