Use V8 Maybe APIs in extensions/renderer

extensions/renderer/blob_native_handler.cc

Index: extensions/renderer/blob_native_handler.cc
diff --git a/extensions/renderer/blob_native_handler.cc b/extensions/renderer/blob_native_handler.cc
index b8b2e5189091fa230e95834c0583e4011f2c32ea..7abee96ee8cbdf9b4f0a1374327ce85b6e0384ac 100644
--- a/extensions/renderer/blob_native_handler.cc
+++ b/extensions/renderer/blob_native_handler.cc
@@ -5,6 +5,7 @@
 #include "extensions/renderer/blob_native_handler.h"
 
 #include "base/bind.h"
+#include "extensions/renderer/v8_maybe_helpers.h"
 #include "third_party/WebKit/public/platform/WebCString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/web/WebBlob.h"
@@ -16,7 +17,7 @@ void GetBlobUuid(const v8::FunctionCallbackInfo<v8::Value>& args) {
   DCHECK_EQ(1, args.Length());
   blink::WebBlob blob = blink::WebBlob::fromV8Value(args[0]);
   args.GetReturnValue().Set(
-      v8::String::NewFromUtf8(args.GetIsolate(), blob.uuid().utf8().data()));
+      extensions::ToV8String(args.GetIsolate(), blob.uuid().utf8().data()));
 }
 
 // Take ownership of a Blob created on the browser process. Expects the Blob's
@@ -33,7 +34,7 @@ void TakeBrowserProcessBlob(const v8::FunctionCallbackInfo<v8::Value>& args) {
   blink::WebBlob blob =
       blink::WebBlob::createFromUUID(blink::WebString::fromUTF8(uuid),
                                      blink::WebString::fromUTF8(type),
-                                     args[2]->Int32Value());
+                                     args[2].As<v8::Int32>()->Value());
   args.GetReturnValue().Set(blob.toV8Value(args.Holder(), args.GetIsolate()));
 }