Clear shader disk cache after glProgramBinary failure.

services/ui/gpu/interfaces/gpu_main.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 ui.mojom;
 
 import "cc/ipc/display_compositor.mojom";
 import "gpu/ipc/common/gpu_preferences.mojom";
 import "services/ui/gpu/interfaces/gpu_host.mojom";
 import "services/ui/gpu/interfaces/gpu_service.mojom";
 
 // This is the primordial interface used to (re)start the mus-gpu bundle
 // of services.
 interface GpuMain {
   CreateDisplayCompositor(
     cc.mojom.DisplayCompositor& display_compositor,
     cc.mojom.DisplayCompositorClient display_compositor_client);
 
   CreateGpuService(GpuService& gpu_service,
                    GpuHost gpu_host,
-                   gpu.mojom.GpuPreferences preferences);
+                   gpu.mojom.GpuPreferences preferences,
+                   handle<shared_buffer> activity_flags);

[sadrul, 2017/03/16 04:40:32]

The new param needs to be optional (the reason for the crashes in the trybots),
i.e.:

  handle<shared_buffer>? activity_flags

[ericrk, 2017/03/16 21:25:23]

Ah, thanks!

 };