ui: Cleanup class/struct forward declarations

ash/aura/wm_window_aura.cc

Index: ash/aura/wm_window_aura.cc
diff --git a/ash/aura/wm_window_aura.cc b/ash/aura/wm_window_aura.cc
index ac850aa00ca98e1860816e4af413187743622985..f43120accd6dc502a3cb412b27d7e8b8e2f604cd 100644
--- a/ash/aura/wm_window_aura.cc
+++ b/ash/aura/wm_window_aura.cc
@@ -292,9 +292,6 @@ bool WmWindowAura::IsSystemModal() const {
 
 bool WmWindowAura::GetBoolProperty(WmWindowProperty key) {
   switch (key) {
-    case WmWindowProperty::DRAW_ATTENTION:
-      return window_->GetProperty(aura::client::kDrawAttentionKey);
-
     case WmWindowProperty::SNAP_CHILDREN_TO_PIXEL_BOUNDARY:
       return window_->GetProperty(kSnapChildrenToPixelBoundary);
 
@@ -370,36 +367,6 @@ void WmWindowAura::SetIntProperty(WmWindowProperty key, int value) {
   NOTREACHED();
 }
 
-std::string WmWindowAura::GetStringProperty(WmWindowProperty key) {
-  if (key == WmWindowProperty::APP_ID) {
-    std::string* value = window_->GetProperty(aura::client::kAppIdKey);
-    return value ? *value : std::string();
-  }
-
-  NOTREACHED();
-  return std::string();
-}
-
-void WmWindowAura::SetStringProperty(WmWindowProperty key,
-                                     const std::string& value) {
-  if (key == WmWindowProperty::APP_ID) {
-    window_->SetProperty(aura::client::kAppIdKey, new std::string(value));
-    return;
-  }
-
-  NOTREACHED();
-}
-
-gfx::ImageSkia WmWindowAura::GetWindowIcon() {
-  gfx::ImageSkia* image = window_->GetProperty(aura::client::kWindowIconKey);
-  return image ? *image : gfx::ImageSkia();
-}
-
-gfx::ImageSkia WmWindowAura::GetAppIcon() {
-  gfx::ImageSkia* image = window_->GetProperty(aura::client::kAppIconKey);
-  return image ? *image : gfx::ImageSkia();
-}
-
 const wm::WindowState* WmWindowAura::GetWindowState() const {
   return ash::wm::GetWindowState(window_);
 }
@@ -438,10 +405,6 @@ std::vector<WmWindow*> WmWindowAura::GetTransientChildren() {
   return FromAuraWindows(::wm::GetTransientChildren(window_));
 }
 
-bool WmWindowAura::MoveToEventRoot(const ui::Event& event) {
-  return ash::wm::MoveWindowToEventRoot(window_, event);
-}
-
 void WmWindowAura::SetLayoutManager(
     std::unique_ptr<WmLayoutManager> layout_manager) {
   // See ~AuraLayoutManagerAdapter for why SetLayoutManager(nullptr) is called.
@@ -876,10 +839,6 @@ void WmWindowAura::OnWindowPropertyChanged(aura::Window* window,
   WmWindowProperty wm_property;
   if (key == aura::client::kAlwaysOnTopKey) {
     wm_property = WmWindowProperty::ALWAYS_ON_TOP;
-  } else if (key == aura::client::kAppIconKey) {
-    wm_property = WmWindowProperty::APP_ICON;
-  } else if (key == aura::client::kDrawAttentionKey) {
-    wm_property = WmWindowProperty::DRAW_ATTENTION;
   } else if (key == aura::client::kExcludeFromMruKey) {
     wm_property = WmWindowProperty::EXCLUDE_FROM_MRU;
   } else if (key == aura::client::kModalKey) {
@@ -894,8 +853,6 @@ void WmWindowAura::OnWindowPropertyChanged(aura::Window* window,
     wm_property = WmWindowProperty::SNAP_CHILDREN_TO_PIXEL_BOUNDARY;
   } else if (key == aura::client::kTopViewInset) {
     wm_property = WmWindowProperty::TOP_VIEW_INSET;
-  } else if (key == aura::client::kWindowIconKey) {
-    wm_property = WmWindowProperty::WINDOW_ICON;
   } else {
     return;
   }