Use unique_ptr for Platform::CreateURLLoader

content/renderer/renderer_blink_platform_impl.cc

Index: content/renderer/renderer_blink_platform_impl.cc
diff --git a/content/renderer/renderer_blink_platform_impl.cc b/content/renderer/renderer_blink_platform_impl.cc
index 91c24cf38bb048f8898ad6be6802ae052beae83c..4f920ce014b4486e37573161643dec1ac36f3ead 100644
--- a/content/renderer/renderer_blink_platform_impl.cc
+++ b/content/renderer/renderer_blink_platform_impl.cc
@@ -302,7 +302,8 @@ void RendererBlinkPlatformImpl::Shutdown() {
 
 //------------------------------------------------------------------------------
 
-blink::WebURLLoader* RendererBlinkPlatformImpl::CreateURLLoader() {
+std::unique_ptr<blink::WebURLLoader>
+RendererBlinkPlatformImpl::CreateURLLoader() {
   ChildThreadImpl* child_thread = ChildThreadImpl::current();
 
   mojom::URLLoaderFactory* factory =
@@ -325,7 +326,7 @@ blink::WebURLLoader* RendererBlinkPlatformImpl::CreateURLLoader() {
 
   // There may be no child thread in RenderViewTests.  These tests can still use
   // data URLs to bypass the ResourceDispatcher.
-  return new content::WebURLLoaderImpl(
+  return base::MakeUnique<WebURLLoaderImpl>(
       child_thread ? child_thread->resource_dispatcher() : nullptr, factory);
 }