Implement rewrite logic for assigning a temporary scoped_refptr to T*.

tools/clang/rewrite_scoped_refptr/tests/temp-assigned-to-field-init-original.cc

Index: tools/clang/rewrite_scoped_refptr/tests/temp-assigned-to-field-init-original.cc
diff --git a/tools/clang/rewrite_scoped_refptr/tests/test10-expected.cc b/tools/clang/rewrite_scoped_refptr/tests/temp-assigned-to-field-init-original.cc
similarity index 56%
copy from tools/clang/rewrite_scoped_refptr/tests/test10-expected.cc
copy to tools/clang/rewrite_scoped_refptr/tests/temp-assigned-to-field-init-original.cc
index a74cd7df9336d8cb9a80f3b4952beb6cea30c6df..c81503ce4a02e9c1907c2d8b508adbfcb8a7899c 100644
--- a/tools/clang/rewrite_scoped_refptr/tests/test10-expected.cc
+++ b/tools/clang/rewrite_scoped_refptr/tests/temp-assigned-to-field-init-original.cc
@@ -8,9 +8,12 @@ struct Foo {
   int dummy;
 };
 
-int TestsAScopedRefptr() {
-  scoped_refptr<Foo> foo(new Foo);
-  if (foo.get())
-    return 1;
-  return 0;
+// Similar to case 2, but with a field initializer.
+scoped_refptr<Foo> GetBuggyFoo() {
+  return new Foo;
 }
+
+class ABuggyCtor {
+  ABuggyCtor() : f_(GetBuggyFoo()) {}
+  Foo* f_;
+};