chromeos: moves a bunch of tests to common_unittests

ash/mus/bridge/wm_shell_mus.cc

Index: ash/mus/bridge/wm_shell_mus.cc
diff --git a/ash/mus/bridge/wm_shell_mus.cc b/ash/mus/bridge/wm_shell_mus.cc
index 814fc5f802d9dc937c30270334c650097a1dd120..ac17b7a6b150faeffa875f85a6f5e61e0b6901bc 100644
--- a/ash/mus/bridge/wm_shell_mus.cc
+++ b/ash/mus/bridge/wm_shell_mus.cc
@@ -268,11 +268,13 @@ void WmShellMus::SetDisplayWorkAreaInsets(WmWindow* window,
 }
 
 bool WmShellMus::IsPinned() {
+  // TODO: http://crbug.com/622486.
   NOTIMPLEMENTED();
   return false;
 }
 
 void WmShellMus::SetPinnedWindow(WmWindow* window) {
+  // TODO: http://crbug.com/622486.
   NOTIMPLEMENTED();
 }