Reduce boilerplace for common pattern to return MaybeHandle.

src/runtime/runtime-liveedit.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 "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/debug/debug.h"
 #include "src/debug/debug-frames.h"
 #include "src/debug/liveedit.h"
@@ skipping 52 matching lines @@
 RUNTIME_FUNCTION(Runtime_LiveEditGatherCompileInfo) {
   HandleScope scope(isolate);
   CHECK(isolate->debug()->live_edit_enabled());
   DCHECK(args.length() == 2);
   CONVERT_ARG_CHECKED(JSValue, script, 0);
   CONVERT_ARG_HANDLE_CHECKED(String, source, 1);
 
   RUNTIME_ASSERT(script->value()->IsScript());
   Handle<Script> script_handle = Handle<Script>(Script::cast(script->value()));
 
-  Handle<JSArray> result;
-  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result, LiveEdit::GatherCompileInfo(script_handle, source));
-  return *result;
+  RETURN_RESULT_OR_FAILURE(isolate,
+                           LiveEdit::GatherCompileInfo(script_handle, source));
 }
 
 
 // Changes the source of the script to a new_source.
 // If old_script_name is provided (i.e. is a String), also creates a copy of
 // the script with its original source and sends notification to debugger.
 RUNTIME_FUNCTION(Runtime_LiveEditReplaceScript) {
   HandleScope scope(isolate);
   CHECK(isolate->debug()->live_edit_enabled());
   DCHECK(args.length() == 3);
@@ skipping 193 matching lines @@
   // We don't really care what the inlined frame index is, since we are
   // throwing away the entire frame anyways.
   const char* error_message = LiveEdit::RestartFrame(it.frame());
   if (error_message) {
     return *(isolate->factory()->InternalizeUtf8String(error_message));
   }
   return heap->true_value();
 }
 }  // namespace internal
 }  // namespace v8