Return MaybeHandle from SetProperty.

test/cctest/test-debug.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 96 matching lines @@
     debug->debug_context()->set_security_token(
         v8::Utils::OpenHandle(*context_)->security_token());
 
     Handle<JSGlobalProxy> global(Handle<JSGlobalProxy>::cast(
         v8::Utils::OpenHandle(*context_->Global())));
     Handle<v8::internal::String> debug_string =
         factory->InternalizeOneByteString(STATIC_ASCII_VECTOR("debug"));
     v8::internal::Runtime::SetObjectProperty(isolate, global, debug_string,
         Handle<Object>(debug->debug_context()->global_proxy(), isolate),
         DONT_ENUM,
-        ::v8::internal::SLOPPY);
+        ::v8::internal::SLOPPY).Assert();
   }
 
  private:
   v8::HandleScope scope_;
   v8::Local<v8::Context> context_;
 };
 
 
 // --- H e l p e r   F u n c t i o n s
 
@@ skipping 7529 matching lines @@
   CHECK(result->IsString());
   v8::String::Utf8Value utf8(result);
   CHECK_EQ("bar", *utf8);
 
   v8::Debug::SetDebugEventListener2(NULL);
   CheckDebuggerUnloaded();
 }
 
 
 #endif  // ENABLE_DEBUGGER_SUPPORT