Change overview mode to so that docked panel windows are not grouped together.

ash/wm/overview/window_selector_controller.cc

Index: ash/wm/overview/window_selector_controller.cc
diff --git a/ash/wm/overview/window_selector_controller.cc b/ash/wm/overview/window_selector_controller.cc
index 6fbe0daef1fc9aeb5e1ca5d4d68f012137b2d658..a6e409af170fa398f24569872ae17a935d7e5d13 100644
--- a/ash/wm/overview/window_selector_controller.cc
+++ b/ash/wm/overview/window_selector_controller.cc
@@ -24,6 +24,7 @@ WindowSelectorController::WindowSelectorController() {
 }
 
 WindowSelectorController::~WindowSelectorController() {
+  DCHECK(!IsSelecting());
 }
 
 // static
@@ -52,7 +53,8 @@ void WindowSelectorController::ToggleOverview() {
     if (windows.empty())
       return;
 
-    window_selector_.reset(new WindowSelector(windows, this));
+    window_selector_.reset(new WindowSelector(this));
+    window_selector_->Init(windows);
     OnSelectionStarted();
   }
 }
@@ -61,9 +63,15 @@ bool WindowSelectorController::IsSelecting() {
   return window_selector_.get() != NULL;
 }
 
+bool WindowSelectorController::IsRestoringMinimizedWindows() const {
+  return window_selector_.get() != NULL &&
+         window_selector_->restoring_minimized_windows();
+}
+
 // TODO(flackr): Make WindowSelectorController observe the activation of
 // windows, so we can remove WindowSelectorDelegate.
 void WindowSelectorController::OnSelectionEnded() {
+  window_selector_->Shutdown();
   window_selector_.reset();
   last_selection_time_ = base::Time::Now();
 }