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..affcff1f5cbb82374823444bcbd30a46388c8e84 100644
--- a/content/common/frame.mojom
+++ b/content/common/frame.mojom
@@ -15,6 +15,16 @@ interface Frame {
   GetInterfaceProvider(service_manager.mojom.InterfaceProvider& interfaces);
 };
 
+// Implemented by the frame (e.g. renderer processes).
+// Instances of this interface must be associated with (i.e., FIFO with) the
+// legacy IPC channel.
+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);
+};
+
 // Implemented by the frame server (i.e. the browser process).
 interface FrameHost {
   GetInterfaceProvider(service_manager.mojom.InterfaceProvider& interfaces);