Fix a bit of C++11 in web/

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index 7e5279359a0c4273b3f791f913f15e5e2b19b532..6ac7134431f81244ccfbefaf59d021d539757aa2 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -218,7 +218,7 @@ Page* ChromeClientImpl::createWindow(LocalFrame* frame, const FrameLoadRequest&
     NavigationPolicy navigationPolicy, ShouldSendReferrer shouldSendReferrer)
 {
     if (!m_webView->client())
-        return 0;
+        return nullptr;
 
     WebNavigationPolicy policy = static_cast<WebNavigationPolicy>(navigationPolicy);
     if (policy == WebNavigationPolicyIgnore)
@@ -232,7 +232,7 @@ Page* ChromeClientImpl::createWindow(LocalFrame* frame, const FrameLoadRequest&
     WebViewImpl* newView = toWebViewImpl(
         m_webView->client()->createView(WebLocalFrameImpl::fromFrame(frame), WrappedResourceRequest(r.resourceRequest()), features, r.frameName(), policy, shouldSendReferrer == NeverSendReferrer));
     if (!newView)
-        return 0;
+        return nullptr;
     return newView->page();
 }
 
@@ -820,7 +820,7 @@ void ChromeClientImpl::annotatedRegionsChanged()
         client->draggableRegionsChanged();
 }
 
-void ChromeClientImpl::didAssociateFormControls(const WillBeHeapVector<RefPtrWillBeMember<Element> >& elements, LocalFrame* frame)
+void ChromeClientImpl::didAssociateFormControls(const WillBeHeapVector<RefPtrWillBeMember<Element>>& elements, LocalFrame* frame)
 {
     WebLocalFrameImpl* webframe = WebLocalFrameImpl::fromFrame(frame);
     if (webframe->autofillClient())