Update SupportsUserData uses with unique_ptr.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index d4bc3f810952cd1795dec2f01f3071aaa089a74b..c38828a5eafa178f98f2e300e872d1d32116ceab 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -13,6 +13,7 @@
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/strings/string_util.h"
@@ -325,7 +326,7 @@ void ContentViewCoreImpl::InitWebContents() {
           SetContentViewCore(this);
   DCHECK(!web_contents_->GetUserData(kContentViewUserDataKey));
   web_contents_->SetUserData(kContentViewUserDataKey,
-                             new ContentViewUserData(this));
+                             base::MakeUnique<ContentViewUserData>(this));
 }
 
 void ContentViewCoreImpl::RenderViewReady() {