Remove SoftwareOutputDeviceMus.

content/browser/compositor/gpu_process_transport_factory.cc

Index: content/browser/compositor/gpu_process_transport_factory.cc
diff --git a/content/browser/compositor/gpu_process_transport_factory.cc b/content/browser/compositor/gpu_process_transport_factory.cc
index 93ecf0e05e52081706fd4b8c92a67c5eb9467016..7a2f6f4c45e8b55ac0443caa2707a085e42ce485 100644
--- a/content/browser/compositor/gpu_process_transport_factory.cc
+++ b/content/browser/compositor/gpu_process_transport_factory.cc
@@ -38,7 +38,6 @@
 #include "content/browser/compositor/offscreen_browser_compositor_output_surface.h"
 #include "content/browser/compositor/reflector_impl.h"
 #include "content/browser/compositor/software_browser_compositor_output_surface.h"
-#include "content/browser/compositor/software_output_device_mus.h"
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
@@ -202,8 +201,8 @@ GpuProcessTransportFactory::CreateSoftwareOutputDevice(
     ui::Compositor* compositor) {
 #if defined(USE_AURA)

[danakj, 2016/08/15 18:32:58]

Or maybe just remove this whole if block? Up to you.

[sadrul, 2016/08/15 22:39:41]

I am keeping it for now, to catch cases where we may unexpectedly run into this
codepath.

   if (shell::ShellIsRemote()) {
-    return std::unique_ptr<cc::SoftwareOutputDevice>(
-        new SoftwareOutputDeviceMus(compositor));
+    NOTREACHED();
+    return nullptr;
   }
 #endif