Ensure that pepper plugins honor the GPU H/W video decode blacklist and the disable-accelerated-vid…

webkit/common/webpreferences.h

Index: webkit/common/webpreferences.h
===================================================================
--- webkit/common/webpreferences.h	(revision 254462)
+++ webkit/common/webpreferences.h	(working copy)
@@ -169,6 +169,10 @@
   // without raising a DOM security exception.
   bool cookie_enabled;
 
+  // This flag indicates whether H/W accelerated video decode is enabled.
+  // Defaults to false.
+  bool accelerated_video_decode_enabled;
+
 #if defined(OS_ANDROID)
   bool text_autosizing_enabled;
   float font_scale_factor;