Revert of Process Statistics header, add max RSS to render_pdfs

tools/ProcStats.h

Index: tools/ProcStats.h
diff --git a/tools/ProcStats.h b/tools/ProcStats.h
deleted file mode 100644
index 42849f1401f9e0cbfc8151e87b0e67dfe4822191..0000000000000000000000000000000000000000
--- a/tools/ProcStats.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef ProcStats_DEFINED
-#define ProcStats_DEFINED
-
-/**
- * ProcStats - Process Statistics Functions
- */
-
-namespace sk_tools {
-
-/**
- *  If not implemented for this OS, returns -1.  Otherwise, return
- *  the maximum resident set size, as reported by getrusage().
- */
-int getMaxResidentSetSizeKB();
-
-}  // namespace sk_tools
-
-#endif  // ProcStats_DEFINED