Revert 114095 - Move the concept of Activation to the Shell.

ui/aura/window.cc

Index: ui/aura/window.cc
===================================================================
--- ui/aura/window.cc	(revision 114098)
+++ ui/aura/window.cc	(working copy)
@@ -103,6 +103,10 @@
 void Window::Hide() {
   SetVisible(false);
   ReleaseCapture();
+  if (RootWindow::GetInstance()->active_window() == this ||
+      !RootWindow::GetInstance()->active_window()) {
+    RootWindow::GetInstance()->ActivateTopmostWindow();
+  }
 }
 
 bool Window::IsVisible() const {
@@ -117,6 +121,19 @@
   return gfx::Rect(origin, bounds().size());
 }
 
+void Window::Activate() {
+  // If we support minimization need to ensure this restores the window first.
+  aura::RootWindow::GetInstance()->SetActiveWindow(this, this);
+}
+
+void Window::Deactivate() {
+  aura::RootWindow::GetInstance()->Deactivate(this);
+}
+
+bool Window::IsActive() const {
+  return aura::RootWindow::GetInstance()->active_window() == this;
+}
+
 void Window::SetTransform(const ui::Transform& transform) {
   layer()->SetTransform(transform);
 }
@@ -202,6 +219,10 @@
   child->OnStackingChanged();
 }
 
+bool Window::CanActivate() const {
+  return IsVisible() && (!delegate_ || delegate_->ShouldActivate(NULL));
+}
+
 void Window::AddChild(Window* child) {
   DCHECK(std::find(children_.begin(), children_.end(), child) ==
       children_.end());