Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

This upates calls to bound temporary objects to also use get().
While it has the same semantic equivalence to the existing code, this generally
represents a dangerous pattern - indeed, part of the whole motivation for this
change is to make this anti-pattern very visible to authors.

This change simply updates all of the call sites, to allow the "operator T*"
to be removed and preventing new instances. The existing instances will then be
reviewed for "suspicious" changes and updated to use/pass scoped_refptr<T>
rather than T*, as appropriate.

BUG=110610
TBR=darin

Review URL: https://codereview.chromium.org/15984016

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@205560 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/net/url_request/url_request_unittest.cc b/net/url_request/url_request_unittest.cc
index 7b2f867e..d57deec 100644
--- a/net/url_request/url_request_unittest.cc
+++ b/net/url_request/url_request_unittest.cc
@@ -3657,15 +3657,21 @@
     path = path.Append(FILE_PATH_LITERAL("data"));
     path = path.Append(FILE_PATH_LITERAL("url_request_unittest"));
     path = path.Append(FILE_PATH_LITERAL("with-headers.html"));
-    element_readers.push_back(new UploadFileElementReader(
-        base::MessageLoopProxy::current(), path, 0, kuint64max, base::Time()));
+    element_readers.push_back(
+        new UploadFileElementReader(base::MessageLoopProxy::current().get(),
+                                    path,
+                                    0,
+                                    kuint64max,
+                                    base::Time()));
 
     // This file should just be ignored in the upload stream.
     element_readers.push_back(new UploadFileElementReader(
-        base::MessageLoopProxy::current(),
+        base::MessageLoopProxy::current().get(),
         base::FilePath(FILE_PATH_LITERAL(
             "c:\\path\\to\\non\\existant\\file.randomness.12345")),
-        0, kuint64max, base::Time()));
+        0,
+        kuint64max,
+        base::Time()));
     r.set_upload(make_scoped_ptr(new UploadDataStream(&element_readers, 0)));
 
     r.Start();