Remove implicit conversions from scoped_refptr to T* in net/

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

BUG=110610

Review URL: https://codereview.chromium.org/509563003

Cr-Commit-Position: refs/heads/master@{#292233}
diff --git a/net/base/file_stream_unittest.cc b/net/base/file_stream_unittest.cc
index 2e308b3..cb5c798c 100644
--- a/net/base/file_stream_unittest.cc
+++ b/net/base/file_stream_unittest.cc
@@ -172,7 +172,7 @@
 
   // Try reading...
   scoped_refptr<IOBufferWithSize> buf = new IOBufferWithSize(10);
-  rv = stream.Read(buf, buf->size(), callback.callback());
+  rv = stream.Read(buf.get(), buf->size(), callback.callback());
   EXPECT_EQ(ERR_UNEXPECTED, callback.GetResult(rv));
 }