[NaCl SDK Docs] Simplify PPAPI documentation generation.

native_client_sdk/src/doc/doxygen/stylesheet.css

Index: native_client_sdk/src/doc/doxygen/stylesheet.css
diff --git a/ppapi/c/documentation/stylesheet.css b/native_client_sdk/src/doc/doxygen/stylesheet.css
similarity index 95%
copy from ppapi/c/documentation/stylesheet.css
copy to native_client_sdk/src/doc/doxygen/stylesheet.css
index 9ed8e38bc41347a28520d93ff0ba84e811a21a5f..157a9d52d1f7c81afc2e7073aeb2786188efb6e5 100644
--- a/ppapi/c/documentation/stylesheet.css
+++ b/native_client_sdk/src/doc/doxygen/stylesheet.css
@@ -1,3 +1,7 @@
+/* Copyright (c) 2014 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
 /*
  * Based off the Doxygen generated template stylesheet and trimmed/edited to
  * remove items that would conflict with codesite or other overlying
@@ -243,4 +247,4 @@ TD.tiny{
 }
 .doxygen-global {
   background-color: #ffcc66;
-}
+}