Clear shader disk cache after glProgramBinary failure.

services/ui/ws/gpu_host.cc

Index: services/ui/ws/gpu_host.cc
diff --git a/services/ui/ws/gpu_host.cc b/services/ui/ws/gpu_host.cc
index bfa771d2719096c64545be4756218e0c0cb422b4..515e19fdf33e3667c625533a8135b6f7506ff580 100644
--- a/services/ui/ws/gpu_host.cc
+++ b/services/ui/ws/gpu_host.cc
@@ -113,7 +113,7 @@ GpuHost::GpuHost(GpuHostDelegate* delegate)
   gpu::GpuPreferences preferences;
   gpu_main_->CreateGpuService(MakeRequest(&gpu_service_),
                               gpu_host_binding_.CreateInterfacePtrAndBind(),
-                              preferences);
+                              preferences, mojo::ScopedSharedBufferHandle());

[ericrk, 2017/03/15 00:47:54]

This is just a no-op for now. Later, if this class wants to listen to any of the
GPU activity flags, it can create a GpuProcessHostActivityFlags and clone its
handle here.

Flags are currently only used with relation to the shader disk cache, which this
class currently no-ops.

   gpu_memory_buffer_manager_ = base::MakeUnique<ServerGpuMemoryBufferManager>(
       gpu_service_.get(), next_client_id_++);
 }