athena: Allow getting into split-view mode from overview-mode.

athena/wm/window_manager_impl.cc

Index: athena/wm/window_manager_impl.cc
diff --git a/athena/wm/window_manager_impl.cc b/athena/wm/window_manager_impl.cc
index f6488e395c14a5790d898a6e001444a2116d5300..4a60767ad2e60dd2d434eba0ed2a587e69a3a724 100644
--- a/athena/wm/window_manager_impl.cc
+++ b/athena/wm/window_manager_impl.cc
@@ -58,6 +58,8 @@ class WindowManagerImpl : public WindowManager,
 
   // WindowOverviewModeDelegate:
   virtual void OnSelectWindow(aura::Window* window) OVERRIDE;
+  virtual void OnSplitViewMode(aura::Window* left,
+                               aura::Window* right) OVERRIDE;
 
   // aura::WindowObserver
   virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE;
@@ -206,6 +208,12 @@ void WindowManagerImpl::OnSelectWindow(aura::Window* window) {
   SetInOverview(false);
 }
 
+void WindowManagerImpl::OnSplitViewMode(aura::Window* left,
+                                        aura::Window* right) {
+  SetInOverview(false);

[mfomitchev, 2014/08/13 15:12:31]

Hmm.. my understanding from the mocks was that you are supposed to stay in
overview-splitview after you drag the window to the side, not exit overview to
splitview right away. Perhaps we should clarify with kuscher.

[sadrul, 2014/08/13 16:20:12]

We are going with this for now. I clarified with kuscher@. Forwarded you the
email.

[mfomitchev, 2014/08/13 17:42:52]

I thought it was a bit ambiguous, so I responded on the thread to clarify. I
think this is fine for now either way though. 

+  split_view_controller_->ActivateSplitMode(left, right);
+}
+
 void WindowManagerImpl::OnWindowAdded(aura::Window* new_window) {
   if (new_window->type() == ui::wm::WINDOW_TYPE_NORMAL)
     SetInOverview(false);