mus: Always use the GPU compositor for mus.

content/browser/gpu/gpu_data_manager_impl_private.cc

Index: content/browser/gpu/gpu_data_manager_impl_private.cc
diff --git a/content/browser/gpu/gpu_data_manager_impl_private.cc b/content/browser/gpu/gpu_data_manager_impl_private.cc
index 613294c67a90769955202205876c42e059a9b774..01756ae45b66a005c65c751c9ac707277f93c752 100644
--- a/content/browser/gpu/gpu_data_manager_impl_private.cc
+++ b/content/browser/gpu/gpu_data_manager_impl_private.cc
@@ -37,6 +37,7 @@
 #include "gpu/config/gpu_switches.h"
 #include "gpu/config/gpu_util.h"
 #include "gpu/ipc/common/memory_stats.h"
+#include "services/shell/runner/common/client_util.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_switches.h"
@@ -985,6 +986,8 @@ bool GpuDataManagerImplPrivate::UpdateActiveGpu(uint32_t vendor_id,
 }
 
 bool GpuDataManagerImplPrivate::CanUseGpuBrowserCompositor() const {
+  if (shell::ShellIsRemote())

[rjkroege, 2016/08/11 17:55:38]

While this is fine for now, I think that it's not the right solution long term.
The browser (mus client in this case) should be asking mus about all of these
details yes? So add a TODO?

[sadrul, 2016/08/11 17:58:08]

What sort of details do you have in mind? (we use shell::ShellIsRemote() to
detect when chrome is running in mus in a number of places).

+    return true;
   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableGpuCompositing))
     return false;