Enabled/disable touch screen in TabletPowerButtonController

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index 76e340fa4c5176516ff1e7a6f26b350e8ff5c5ff..f36aa473b6852b2e9af513e6e0bc03aa1f62fba9 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -265,5 +265,14 @@ gfx::Image ShellDelegateImpl::GetDeprecatedAcceleratorImage() const {
   return gfx::Image();
 }
 
+bool ShellDelegateImpl::IsTouchscreenEnabledInPrefs(bool is_local) const {
+  return true;

[Daniel Erat, 2016/12/02 21:48:56]

should these have NOTIMPLEMENTED() as well? i think we usually use
NOTIMPLEMENTED() for methods that aren't implemented yet but that should be in
the future (i believe the macro was introduced when porting chrome to
non-windows platforms). is that the case here, or will these never be
implemented?

[Qiang(Joe) Xu, 2016/12/02 23:55:10]

I think they will never be implemented here as this method needs chrome/browser
dependency.

+}
+
+void ShellDelegateImpl::SetTouchscreenEnabledInPrefs(bool enabled,
+                                                     bool is_local) {}
+
+void ShellDelegateImpl::UpdateTouchscreenStatusFromPrefs() {}
+
 }  // namespace shell
 }  // namespace ash