Enable touch text selection on Athena

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 b37339e3cf7cca7b76aad83cc3e4ae66a5508c24..f33a61e50926cdf3a9e4f1eb9108d688f9adffaf 100644
--- a/athena/wm/window_overview_mode.cc
+++ b/athena/wm/window_overview_mode.cc
@@ -110,18 +110,30 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
   virtual ~WindowOverviewModeImpl() {
     container_->set_target_handler(container_->delegate());
 
-    aura::Window::Windows windows = container_->children();
+    aura::Window::Windows windows = GetNormalWindows();
     if (windows.empty())
       return;
     std::for_each(windows.begin(), windows.end(), &RestoreWindowState);
   }
 
  private:
+  aura::Window::Windows GetNormalWindows() const {
+    aura::Window::Windows windows;
+    const aura::Window::Windows& children = container_->children();
+    for (aura::Window::Windows::const_iterator iter = children.begin();
+         iter != children.end();
+         iter++) {
+      if ((*iter)->type() == ui::wm::WINDOW_TYPE_NORMAL)
+        windows.push_back(*iter);
+    }
+    return windows;
+  }
+
   // Computes the transforms for all windows in both the topmost and bottom-most
   // positions. The transforms are set in the |kWindowOverviewState| property of
   // the windows.
   void ComputeTerminalStatesForAllWindows() {
-    aura::Window::Windows windows = container_->children();
+    aura::Window::Windows windows = GetNormalWindows();
     size_t window_count = windows.size();
     size_t index = 0;
     const gfx::Size container_size = container_->bounds().size();
@@ -159,7 +171,7 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
 
   // Sets the initial position for the windows for the overview mode.
   void SetInitialWindowStates() {
-    aura::Window::Windows windows = container_->children();
+    aura::Window::Windows windows = GetNormalWindows();
     size_t window_count = windows.size();
     // The initial overview state of the topmost three windows.
     const float kInitialProgress[] = { 0.5f, 0.05f, 0.01f };
@@ -222,7 +234,7 @@ class WindowOverviewModeImpl : public WindowOverviewMode,
   // scrolling up; and positive when scrolling down.
   void DoScroll(float delta_y) {
     const float kEpsilon = 1e-3f;
-    aura::Window::Windows windows = container_->children();
+    aura::Window::Windows windows = GetNormalWindows();
     float delta_y_p = std::abs(delta_y) / GetScrollableHeight();
     if (delta_y < 0) {
       // Scroll up. Start with the top-most (i.e. behind-most in terms of