Use unique_ptr for Create{ServiceWorkerNetworkProvider,ApplicationCacheHost}

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index 6c8ad23375dbcb01b52ab2c6176de2251c9c4413..ec495b9e0488e054be820d3e978b260280385dea 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -3001,10 +3001,11 @@ blink::WebMediaPlayer* RenderFrameImpl::CreateMediaPlayer(
   return media_player;
 }
 
-blink::WebApplicationCacheHost* RenderFrameImpl::CreateApplicationCacheHost(
+std::unique_ptr<blink::WebApplicationCacheHost>
+RenderFrameImpl::CreateApplicationCacheHost(
     blink::WebApplicationCacheHostClient* client) {
   if (!frame_ || !frame_->View())
-    return NULL;
+    return nullptr;
 
   DocumentState* document_state =
       frame_->ProvisionalDataSource()
@@ -3014,7 +3015,7 @@ blink::WebApplicationCacheHost* RenderFrameImpl::CreateApplicationCacheHost(
   NavigationStateImpl* navigation_state =
       static_cast<NavigationStateImpl*>(document_state->navigation_state());
 
-  return new RendererWebApplicationCacheHostImpl(
+  return base::MakeUnique<RendererWebApplicationCacheHostImpl>(
       RenderViewImpl::FromWebView(frame_->View()), client,
       RenderThreadImpl::current()->appcache_dispatcher()->backend_proxy(),
       navigation_state->request_params().appcache_host_id);
@@ -3087,7 +3088,7 @@ blink::BlameContext* RenderFrameImpl::GetFrameBlameContext() {
   return blame_context_.get();
 }
 
-blink::WebServiceWorkerProvider*
+std::unique_ptr<blink::WebServiceWorkerProvider>
 RenderFrameImpl::CreateServiceWorkerProvider() {
   // At this point we should have non-null data source.
   DCHECK(frame_->DataSource());
@@ -3100,7 +3101,7 @@ RenderFrameImpl::CreateServiceWorkerProvider() {
     // The context can be null when the frame is sandboxed.
     return nullptr;
   }
-  return new WebServiceWorkerProviderImpl(
+  return base::MakeUnique<WebServiceWorkerProviderImpl>(
       ChildThreadImpl::current()->thread_safe_sender(), provider->context());
 }