Converts most of WorkspaceLayoutManager tests to use common code

ash/mus/bridge/wm_window_mus.cc

Index: ash/mus/bridge/wm_window_mus.cc
diff --git a/ash/mus/bridge/wm_window_mus.cc b/ash/mus/bridge/wm_window_mus.cc
index b52b740e9832d85ca16cd0b0bd2d2b23eb6bc34f..8a87b8cb97acd09faf267818b83ac236480c47e6 100644
--- a/ash/mus/bridge/wm_window_mus.cc
+++ b/ash/mus/bridge/wm_window_mus.cc
@@ -246,8 +246,20 @@ bool WmWindowMus::IsBubble() {
   return GetWindowType(window_) == ui::mojom::WindowType::BUBBLE;
 }
 
+bool WmWindowMus::GetLayerTargetVisibility() {

[James Cook, 2016/10/04 23:16:04]

match header order (after header matches parent interface order)

[sky, 2016/10/06 17:57:07]

Done.

+  // TODO: http://crbug.com/652877.
+  NOTIMPLEMENTED();
+  return GetTargetVisibility();
+}
+
+bool WmWindowMus::GetLayerVisible() {
+  // TODO: http://crbug.com/652877.
+  NOTIMPLEMENTED();
+  return IsVisible();
+}
+
 ui::Layer* WmWindowMus::GetLayer() {
-  // TODO(sky): this function should be nuked entirely.
+  // TODO: http://crbug.com/652877.
   NOTIMPLEMENTED();
   return widget_ ? widget_->GetLayer() : nullptr;
 }
@@ -740,6 +752,11 @@ void WmWindowMus::StackChildBelow(WmWindow* child, WmWindow* target) {
                                ui::mojom::OrderDirection::BELOW);
 }
 
+void WmWindowMus::SetPinned(bool trusted) {
+  // http://crbug.com/622486.
+  NOTIMPLEMENTED();
+}
+
 void WmWindowMus::SetAlwaysOnTop(bool value) {
   mus::SetAlwaysOnTop(window_, value);
 }