Eliminate WindowTreeConnection

mash/wm/shadow_controller.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "mash/wm/shadow_controller.h"
 
 #include "components/mus/public/cpp/window.h"
-#include "components/mus/public/cpp/window_tree_connection.h"
+#include "components/mus/public/cpp/window_tree_client.h"
 #include "mash/wm/property_util.h"
 #include "mash/wm/shadow.h"
 
 namespace mash {
 namespace wm {
 namespace {
 
 // Returns the first ancestor of |from| (including |from|) that has a shadow.
 mus::Window* FindAncestorWithShadow(mus::Window* from) {
   mus::Window* result = from;
   while (result && !GetShadow(result))
     result = result->parent();
   // Small shadows never change.
   return result && GetShadow(result)->style() != Shadow::STYLE_SMALL ? result
                                                                      : nullptr;
 }
 
 }  // namespace
 
-ShadowController::ShadowController(mus::WindowTreeConnection* window_tree)
+ShadowController::ShadowController(mus::WindowTreeClient* window_tree)
     : window_tree_(window_tree), active_window_(nullptr) {
   window_tree_->AddObserver(this);
   SetActiveWindow(FindAncestorWithShadow(window_tree_->GetFocusedWindow()));
 }
 
 ShadowController::~ShadowController() {
   window_tree_->RemoveObserver(this);
   if (active_window_)
     active_window_->RemoveObserver(this);
 }
@@ skipping 19 matching lines @@
   SetActiveWindow(FindAncestorWithShadow(gained_focus));
 }
 
 void ShadowController::OnWindowDestroying(mus::Window* window) {
   DCHECK_EQ(window, active_window_);
   SetActiveWindow(nullptr);
 }
 
 }  // namespace wm
 }  // namespace mash