Draggable peeking/fullscreen launcher with transparent background.

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index e7e58d454ad2dbda5ea3c06a0f7bb4fb81ef8b5b..8600cd4dd1bc1db9292e8505574c46fd1ada1644 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -554,6 +554,12 @@ void Shell::SetIsBrowserProcessWithMash() {
   g_is_browser_process_with_mash = true;
 }
 
+void Shell::OnAppListVisibilityChanged(bool visible,
+                                       aura::Window* root_window) {
+  for (auto& observer : shell_observers_)
+    observer.OnAppListVisibilityChanged(visible, root_window);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Shell, private:
 
@@ -919,11 +925,9 @@ void Shell::Init(const ShellInitParams& init_params) {
   if (!display_initialized)
     display_manager_->InitDefaultDisplay();
 
-  // TODO(sky): move this to chrome for mash. http://crbug.com/729824.
-  if (ShouldEnableSimplifiedDisplayManagement())
+  if (config == Config::CLASSIC) {
     display_manager_->RefreshFontParams();
 
-  if (config == Config::CLASSIC) {
     aura::Env::GetInstance()->set_context_factory(init_params.context_factory);
     aura::Env::GetInstance()->set_context_factory_private(
         init_params.context_factory_private);