Remove implicit conversions from scoped_refptr to T* in content/

This patch was generated by running the rewrite_scoped_refptr clang tool
on a Linux build.

BUG=110610

Review URL: https://codereview.chromium.org/504273002

Cr-Commit-Position: refs/heads/master@{#291986}
diff --git a/content/browser/security_exploit_browsertest.cc b/content/browser/security_exploit_browsertest.cc
index 9fadec0..39712855 100644
--- a/content/browser/security_exploit_browsertest.cc
+++ b/content/browser/security_exploit_browsertest.cc
@@ -139,8 +139,10 @@
       new SessionStorageNamespaceImpl(dom_storage_context));
   // Cause a deliberate collision in routing ids.
   int main_frame_routing_id = duplicate_routing_id + 1;
-  pending_rvh->CreateNewWindow(
-      duplicate_routing_id, main_frame_routing_id, params, session_storage);
+  pending_rvh->CreateNewWindow(duplicate_routing_id,
+                               main_frame_routing_id,
+                               params,
+                               session_storage.get());
 
   // If the above operation doesn't cause a crash, the test has succeeded!
 }