Adding functions to the window_list_provider for accessing the activities window list

athena/wm/window_overview_mode.cc

Index: athena/wm/window_overview_mode.cc
diff --git a/athena/wm/window_overview_mode.cc b/athena/wm/window_overview_mode.cc
index 7b3c73e0fc77156a093cf49fe34945a4f3cc8441..2263b13fb3b7186d71caf415d780fc11ec6b15ee 100644
--- a/athena/wm/window_overview_mode.cc
+++ b/athena/wm/window_overview_mode.cc
@@ -180,7 +180,8 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
   virtual ~WindowOverviewModeImpl() {
     container_->set_target_handler(container_->delegate());
     RemoveAnimationObserver();
-    aura::Window::Windows windows = window_list_provider_->GetWindowList();
+    aura::Window::Windows windows =
+        window_list_provider_->GetCurrentWindowList();
     if (windows.empty())
       return;
     std::for_each(windows.begin(), windows.end(),
@@ -193,7 +194,8 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
   // positions. The transforms are set in the |kWindowOverviewState| property of
   // the windows.
   void ComputeTerminalStatesForAllWindows() {
-    aura::Window::Windows windows = window_list_provider_->GetWindowList();
+    aura::Window::Windows windows =
+        window_list_provider_->GetCurrentWindowList();
     size_t index = 0;
 
     for (aura::Window::Windows::const_reverse_iterator iter = windows.rbegin();
@@ -252,7 +254,8 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
 
   // Sets the initial position for the windows for the overview mode.
   void SetInitialWindowStates() {
-    aura::Window::Windows windows = window_list_provider_->GetWindowList();
+    aura::Window::Windows windows =
+        window_list_provider_->GetCurrentWindowList();
     // The initial overview state of the topmost three windows.
     const float kInitialProgress[] = { 0.5f, 0.05f, 0.01f };
     size_t index = 0;
@@ -312,7 +315,8 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
   void DoScroll(float delta_y) {
     const float kEpsilon = 1e-3f;
     float delta_y_p = std::abs(delta_y) / GetScrollableHeight();
-    aura::Window::Windows windows = window_list_provider_->GetWindowList();
+    aura::Window::Windows windows =
+        window_list_provider_->GetCurrentWindowList();
     if (delta_y < 0) {
       // Scroll up. Start with the top-most (i.e. behind-most in terms of
       // z-index) window, and try to scroll them up.
@@ -505,7 +509,8 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
       dragged_window_->layer()->SetOpacity(kMinOpacity);
     }
 
-    const aura::Window::Windows list = window_list_provider_->GetWindowList();
+    const aura::Window::Windows list =
+        window_list_provider_->GetCurrentWindowList();
     CHECK(!list.empty());
     if (list.front() == dragged_window_) {
       // There's no window behind |dragged_window_|. So move the windows in