ui: Cleanup class/struct forward declarations

ash/mus/bridge/wm_window_mus.cc

Index: ash/mus/bridge/wm_window_mus.cc
diff --git a/ash/mus/bridge/wm_window_mus.cc b/ash/mus/bridge/wm_window_mus.cc
index d327bc70be53b11be3624374275fd2cfe5d39c04..b35cad1fd4bd3de46a038bc37038175c43b06441 100644
--- a/ash/mus/bridge/wm_window_mus.cc
+++ b/ash/mus/bridge/wm_window_mus.cc
@@ -9,7 +9,6 @@
 #include "ash/common/wm/window_positioning_utils.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm_layout_manager.h"
-#include "ash/common/wm_lookup.h"
 #include "ash/common/wm_transient_window_observer.h"
 #include "ash/common/wm_window_observer.h"
 #include "ash/common/wm_window_property.h"
@@ -377,10 +376,6 @@ bool WmWindowMus::GetBoolProperty(WmWindowProperty key) {
     case WmWindowProperty::ALWAYS_ON_TOP:
       return IsAlwaysOnTop();
 
-    case WmWindowProperty::DRAW_ATTENTION:
-      NOTIMPLEMENTED();
-      return false;
-
     case WmWindowProperty::EXCLUDE_FROM_MRU:
       return GetExcludeFromMru(window_);
 
@@ -496,26 +491,6 @@ void WmWindowMus::SetIntProperty(WmWindowProperty key, int value) {
   NOTREACHED();
 }
 
-std::string WmWindowMus::GetStringProperty(WmWindowProperty key) {
-  NOTIMPLEMENTED();
-  return std::string();
-}
-
-void WmWindowMus::SetStringProperty(WmWindowProperty key,
-                                    const std::string& value) {
-  NOTIMPLEMENTED();
-}
-
-gfx::ImageSkia WmWindowMus::GetWindowIcon() {
-  NOTIMPLEMENTED();
-  return gfx::ImageSkia();
-}
-
-gfx::ImageSkia WmWindowMus::GetAppIcon() {
-  NOTIMPLEMENTED();
-  return gfx::ImageSkia();
-}
-
 const wm::WindowState* WmWindowMus::GetWindowState() const {
   return window_state_.get();
 }
@@ -555,20 +530,6 @@ std::vector<WmWindow*> WmWindowMus::GetTransientChildren() {
   return FromMusWindows(window_->transient_children());
 }
 
-bool WmWindowMus::MoveToEventRoot(const ui::Event& event) {
-  views::View* target = static_cast<views::View*>(event.target());
-  if (!target)
-    return false;
-  WmWindow* target_root =
-      WmLookup::Get()->GetWindowForWidget(target->GetWidget())->GetRootWindow();
-  if (!target_root || target_root == GetRootWindow())
-    return false;
-  WmWindow* window_container =
-      target_root->GetChildByShellWindowId(GetParent()->GetShellWindowId());
-  window_container->AddChild(this);
-  return true;
-}
-
 void WmWindowMus::SetLayoutManager(
     std::unique_ptr<WmLayoutManager> layout_manager) {
   if (layout_manager) {