Return MaybeHandle from SetElement and DeleteElement.

test/cctest/test-api.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 15710 matching lines @@
   result = CompileRun("var sum = 0;"
                       "for (var i = 0; i < 8; i++) {"
                       "  sum += pixels[i];"
                       "}"
                       "sum;");
   CHECK_EQ(28, result->Int32Value());
 
   i::Handle<i::Smi> value(i::Smi::FromInt(2),
                           reinterpret_cast<i::Isolate*>(context->GetIsolate()));
   i::Handle<i::Object> no_failure;
-  no_failure = i::JSObject::SetElement(jsobj, 1, value, NONE, i::SLOPPY);
+  no_failure = i::JSObject::SetElement(
+      jsobj, 1, value, NONE, i::SLOPPY).ToHandleChecked();
   ASSERT(!no_failure.is_null());
   i::USE(no_failure);
   CheckElementValue(isolate, 2, jsobj, 1);
   *value.location() = i::Smi::FromInt(256);
-  no_failure = i::JSObject::SetElement(jsobj, 1, value, NONE, i::SLOPPY);
+  no_failure = i::JSObject::SetElement(
+      jsobj, 1, value, NONE, i::SLOPPY).ToHandleChecked();
   ASSERT(!no_failure.is_null());
   i::USE(no_failure);
   CheckElementValue(isolate, 255, jsobj, 1);
   *value.location() = i::Smi::FromInt(-1);
-  no_failure = i::JSObject::SetElement(jsobj, 1, value, NONE, i::SLOPPY);
+  no_failure = i::JSObject::SetElement(
+      jsobj, 1, value, NONE, i::SLOPPY).ToHandleChecked();
   ASSERT(!no_failure.is_null());
   i::USE(no_failure);
   CheckElementValue(isolate, 0, jsobj, 1);
 
   result = CompileRun("for (var i = 0; i < 8; i++) {"
                       "  pixels[i] = (i * 65) - 109;"
                       "}"
                       "pixels[1] + pixels[6];");
   CHECK_EQ(255, result->Int32Value());
   CheckElementValue(isolate, 0, jsobj, 0);
@@ skipping 6638 matching lines @@
              "f.call(friend);");
   CHECK_EQ(2, named_access_count);
 
   // Test access using Object.setPrototypeOf reflective method.
   named_access_count = 0;
   CompileRun("Object.setPrototypeOf(friend, {});");
   CHECK_EQ(1, named_access_count);
   CompileRun("Object.getPrototypeOf(friend);");
   CHECK_EQ(2, named_access_count);
 }