Change allowed bindings to be per RenderFrame instead of per RenderView.

content/common/frame.mojom

Index: content/common/frame.mojom
diff --git a/content/common/frame.mojom b/content/common/frame.mojom
index f751a31a5dbc1c6a350d9f3c6c5a936444ae0630..408cc55b3b27a96d51d62bb3cf26d1b27c9dc485 100644
--- a/content/common/frame.mojom
+++ b/content/common/frame.mojom
@@ -25,3 +25,10 @@ interface FrameHost {
 interface FrameFactory {
   CreateFrame(int32 frame_routing_id, Frame& frame, FrameHost host);
 };
+
+interface FrameBindingsControl {
+  // Used to tell a render frame whether it should expose various bindings
+  // that allow JS content extended privileges.  See BindingsPolicy for valid
+  // flag values.
+  AllowBindings(int32 enabled_bindings_flags);
+};