Use V8 Maybe APIs in extensions/renderer

extensions/renderer/logging_native_handler.cc

 // Copyright 2014 The Chromium 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 "extensions/renderer/logging_native_handler.h"
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
 
 namespace extensions {
@@ skipping 49 matching lines @@
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK_EQ(1, args.Length());
   LOG(WARNING) << *v8::String::Utf8Value(args[0]);
 }
 
 void LoggingNativeHandler::ParseArgs(
     const v8::FunctionCallbackInfo<v8::Value>& args,
     bool* check_value,
     std::string* error_message) {
   CHECK_LE(args.Length(), 2);
-  *check_value = args[0]->BooleanValue();
+  auto maybe = args[0]->BooleanValue(args.GetIsolate()->GetCurrentContext());
+  if (maybe.IsNothing()) {
+    *error_message = "Error: Cannot continue execution.";
+    return;
+  }
+  *check_value = maybe.FromJust();
   if (args.Length() == 2) {
     *error_message = "Error: " + std::string(*v8::String::Utf8Value(args[1]));
   }
 
   v8::Local<v8::StackTrace> stack_trace =
       v8::StackTrace::CurrentStackTrace(args.GetIsolate(), 10);
   if (stack_trace.IsEmpty() || stack_trace->GetFrameCount() <= 0) {
     *error_message += "\n    <no stack trace>";
   } else {
     for (size_t i = 0; i < (size_t)stack_trace->GetFrameCount(); ++i) {
@@ skipping 12 matching lines @@
 std::string LoggingNativeHandler::ToStringOrDefault(
     const v8::Local<v8::String>& v8_string,
     const std::string& dflt) {
   if (v8_string.IsEmpty())
     return dflt;
   std::string ascii_value = *v8::String::Utf8Value(v8_string);
   return ascii_value.empty() ? dflt : ascii_value;
 }
 
 }  // namespace extensions