Browser Plugin: Rename old colliding files to old_*.

content/renderer/browser_plugin/old/old_browser_plugin.h

Index: content/renderer/browser_plugin/old/old_browser_plugin.h
diff --git a/content/renderer/browser_plugin/old/browser_plugin.h b/content/renderer/browser_plugin/old/old_browser_plugin.h
similarity index 94%
rename from content/renderer/browser_plugin/old/browser_plugin.h
rename to content/renderer/browser_plugin/old/old_browser_plugin.h
index 5184f511d1dc2707d85f162f151ff3679a0e2b2e..8a15ba80cc3ce0744ac47706ae292f622a1043aa 100644
--- a/content/renderer/browser_plugin/old/browser_plugin.h
+++ b/content/renderer/browser_plugin/old/old_browser_plugin.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_RENDERER_BROWSER_PLUGIN_OLD_BROWSER_PLUGIN_H_
-#define CONTENT_RENDERER_BROWSER_PLUGIN_OLD_BROWSER_PLUGIN_H_
+#ifndef CONTENT_RENDERER_BROWSER_PLUGIN_OLD_OLD_BROWSER_PLUGIN_H_
+#define CONTENT_RENDERER_BROWSER_PLUGIN_OLD_OLD_BROWSER_PLUGIN_H_
 
 #include "base/process.h"
 #include "content/renderer/render_view_impl.h"
@@ -91,4 +91,4 @@ class BrowserPlugin {
 }  // namespace old
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_BROWSER_PLUGIN_OLD_BROWSER_PLUGIN_H_
+#endif  // CONTENT_RENDERER_BROWSER_PLUGIN_OLD_OLD_BROWSER_PLUGIN_H_