Set the window frames to be non transparent while the user is cycling through workspaces

ash/wm/workspace/workspace_cycler_animator.cc

Index: ash/wm/workspace/workspace_cycler_animator.cc
diff --git a/ash/wm/workspace/workspace_cycler_animator.cc b/ash/wm/workspace/workspace_cycler_animator.cc
index a22375c4e84c3d6fae22c83b3c8256085dc44ad9..0575c026771be89595422073bc00cb8f406f027c 100644
--- a/ash/wm/workspace/workspace_cycler_animator.cc
+++ b/ash/wm/workspace/workspace_cycler_animator.cc
@@ -13,10 +13,12 @@
 #include "ash/shell_window_ids.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/shelf_layout_manager.h"
+#include "ash/wm/window_properties.h"
 #include "ash/wm/workspace/colored_window_controller.h"
 #include "ash/wm/workspace/workspace.h"
 #include "ash/wm/workspace/workspace_cycler_configuration.h"
 #include "base/values.h"
+#include "ui/aura/root_window.h"
 #include "ui/aura/window.h"
 #include "ui/base/events/event_utils.h"
 #include "ui/compositor/layer_animator.h"
@@ -388,6 +390,11 @@ void WorkspaceCyclerAnimator::Init(const std::vector<Workspace*>& workspaces,
 }
 
 void WorkspaceCyclerAnimator::AnimateStartingCycler() {
+  // Set kCyclingThroughWorkspaces so that the window frame is painted with the
+  // correct style.
+  workspaces_[0]->window()->GetRootWindow()->SetProperty(
+      ash::internal::kCyclingThroughWorkspacesKey, true);
+
   // Ensure that the workspaces are stacked with respect to their order
   // in |workspaces_|.
   aura::Window* parent = workspaces_[0]->window()->parent();
@@ -592,6 +599,10 @@ void WorkspaceCyclerAnimator::AnimateToUpdatedState(int animation_duration) {
 }
 
 void WorkspaceCyclerAnimator::CyclerStopped(size_t visible_workspace_index) {
+  aura::Window* root_window = workspaces_[0]->window()->GetRootWindow();
+  root_window->SetProperty(ash::internal::kCyclingThroughWorkspacesKey,
+                           false);
+
   for(size_t i = 0; i < workspaces_.size(); ++i) {
     aura::Window* window = workspaces_[i]->window();
     ui::Layer* layer = window->layer();