Use V8 Maybe APIs in extensions/renderer

extensions/renderer/process_info_native_handler.cc

Index: extensions/renderer/process_info_native_handler.cc
diff --git a/extensions/renderer/process_info_native_handler.cc b/extensions/renderer/process_info_native_handler.cc
index b8fcb57343453998a393ad5ea934f075322ccc5d..adc575614e2b6dca208279609a61acf45067e20e 100644
--- a/extensions/renderer/process_info_native_handler.cc
+++ b/extensions/renderer/process_info_native_handler.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "extensions/renderer/script_context.h"
+#include "extensions/renderer/v8_maybe_helpers.h"
 
 namespace extensions {
 
@@ -50,14 +51,18 @@ ProcessInfoNativeHandler::ProcessInfoNativeHandler(
 
 void ProcessInfoNativeHandler::GetExtensionId(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
-  args.GetReturnValue().Set(
-      v8::String::NewFromUtf8(args.GetIsolate(), extension_id_.c_str()));
+  if (extension_id_.size() >= v8::String::kMaxLength)
+    return;
+  args.GetReturnValue().Set(ToV8String(args.GetIsolate(),
+                                       extension_id_.c_str()));
 }
 
 void ProcessInfoNativeHandler::GetContextType(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
-  args.GetReturnValue().Set(
-      v8::String::NewFromUtf8(args.GetIsolate(), context_type_.c_str()));
+  if (context_type_.size() >= v8::String::kMaxLength)
+    return;
+  args.GetReturnValue().Set(ToV8String(args.GetIsolate(),
+                                       context_type_.c_str()));
 }
 
 void ProcessInfoNativeHandler::InIncognitoContext(
@@ -78,7 +83,7 @@ void ProcessInfoNativeHandler::GetManifestVersion(
 void ProcessInfoNativeHandler::IsSendRequestDisabled(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   if (send_request_disabled_) {
-    args.GetReturnValue().Set(v8::String::NewFromUtf8(
+    args.GetReturnValue().Set(ToV8String(
         args.GetIsolate(),
         "sendRequest and onRequest are obsolete."
         " Please use sendMessage and onMessage instead."));