Add command line flag and associated prefs to allow run-time enable of geoloc...

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
===================================================================
--- chrome/common/render_messages.h	(revision 33809)
+++ chrome/common/render_messages.h	(working copy)
@@ -1625,6 +1625,7 @@
     WriteParam(m, p.user_style_sheet_location);
     WriteParam(m, p.allow_universal_access_from_file_urls);
     WriteParam(m, p.experimental_webgl_enabled);
+    WriteParam(m, p.geolocation_enabled);
   }
   static bool Read(const Message* m, void** iter, param_type* p) {
     return
@@ -1663,7 +1664,8 @@
         ReadParam(m, iter, &p->user_style_sheet_enabled) &&
         ReadParam(m, iter, &p->user_style_sheet_location) &&
         ReadParam(m, iter, &p->allow_universal_access_from_file_urls) &&
-        ReadParam(m, iter, &p->experimental_webgl_enabled);
+        ReadParam(m, iter, &p->experimental_webgl_enabled) &&
+        ReadParam(m, iter, &p->geolocation_enabled);
   }
   static void Log(const param_type& p, std::wstring* l) {
     l->append(L"<WebPreferences>");