content/common/render_message_filter.mojom

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

module content.mojom;

import "mojo/public/mojom/base/thread_priority.mojom";
import "mojo/public/mojom/base/unguessable_token.mojom";

interface RenderMessageFilter {
  // Synchronously generates a new routing ID for the caller.
  [Sync] GenerateRoutingID() => (int32 routing_id);

  // Similar to GenerateRoutingID but also generates a frame token and
  // devtools_frame_token. A subsequent call to FrameHost::CreateChildFrame
  // is expected after this call.
  [Sync] GenerateFrameRoutingID() => (int32 routing_id,
                   mojo_base.mojom.UnguessableToken frame_token,
                   mojo_base.mojom.UnguessableToken devtools_frame_token);

  // A renderer sends this when it wants to know whether a gpu process exists.
  [Sync] HasGpuProcess() => (bool has_gpu_process);

  // Asks the browser to change the priority of thread.
  [EnableIf=supports_thread_priorities]
  SetThreadPriority(int32 platform_thread_id,
                    mojo_base.mojom.ThreadPriority thread_priority);
};