Update Linux to use scoped_refptr<T>::get() rather than implicit "operator T*"

net/disk_cache/simple/simple_index_file_unittest.cc

Index: net/disk_cache/simple/simple_index_file_unittest.cc
diff --git a/net/disk_cache/simple/simple_index_file_unittest.cc b/net/disk_cache/simple/simple_index_file_unittest.cc
index ac22112481ec9bf558ac01719d19a6198f15f9d5..6d3720323cc7436320bde2fe4a6efe64ae0ac381 100644
--- a/net/disk_cache/simple/simple_index_file_unittest.cc
+++ b/net/disk_cache/simple/simple_index_file_unittest.cc
@@ -62,10 +62,9 @@ class WrappedSimpleIndexFile : public SimpleIndexFile {
   using SimpleIndexFile::Serialize;
 
   explicit WrappedSimpleIndexFile(const base::FilePath& index_file_directory)
-      : SimpleIndexFile(base::MessageLoopProxy::current(),
-                        base::MessageLoopProxy::current(),
-                        index_file_directory) {
-  }
+      : SimpleIndexFile(base::MessageLoopProxy::current().get(),
+                        base::MessageLoopProxy::current().get(),
+                        index_file_directory) {}
   virtual ~WrappedSimpleIndexFile() {
   }
 };
@@ -233,7 +232,7 @@ TEST_F(SimpleIndexFileTest, LoadCorruptIndex) {
   EXPECT_FALSE(WrappedSimpleIndexFile::IsIndexFileStale(index_path));
 
   WrappedSimpleIndexFile simple_index_file(temp_dir.path());
-  simple_index_file.LoadIndexEntries(base::MessageLoopProxy::current(),
+  simple_index_file.LoadIndexEntries(base::MessageLoopProxy::current().get(),
                                      GetCallback());
   base::RunLoop().RunUntilIdle();