[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr in src/…

cc/blink/web_external_texture_layer_impl.cc

Index: cc/blink/web_external_texture_layer_impl.cc
diff --git a/cc/blink/web_external_texture_layer_impl.cc b/cc/blink/web_external_texture_layer_impl.cc
index e6c8a64607da14d1c846e7ad2cc79efc1899c675..85aac10fe0d079a16c7ac103acfabb8f3a181839 100644
--- a/cc/blink/web_external_texture_layer_impl.cc
+++ b/cc/blink/web_external_texture_layer_impl.cc
@@ -25,7 +25,7 @@ namespace cc_blink {
 WebExternalTextureLayerImpl::WebExternalTextureLayerImpl(
     blink::WebExternalTextureLayerClient* client)
     : client_(client) {
-  cc::TextureLayerClient* cc_client = client_ ? this : NULL;
+  cc::TextureLayerClient* cc_client = client_ ? this : nullptr;
   scoped_refptr<TextureLayer> layer = TextureLayer::CreateForMailbox(cc_client);
   layer->SetIsDrawable(true);
   layer_.reset(new WebLayerImpl(layer));
@@ -67,7 +67,7 @@ bool WebExternalTextureLayerImpl::PrepareTextureMailbox(
     scoped_ptr<cc::SingleReleaseCallback>* release_callback,
     bool use_shared_memory) {
   blink::WebExternalTextureMailbox client_mailbox;
-  WebExternalBitmapImpl* bitmap = NULL;
+  WebExternalBitmapImpl* bitmap = nullptr;
 
   if (use_shared_memory)
     bitmap = AllocateBitmap();