ui: Cleanup class/struct forward declarations

services/ui/ws/platform_display.h

Index: services/ui/ws/platform_display.h
diff --git a/services/ui/ws/platform_display.h b/services/ui/ws/platform_display.h
index 96b52cf8fb56235640f317566da47b4d4173d4cc..33ad23ecec99670c01907c07cde32c3530953154 100644
--- a/services/ui/ws/platform_display.h
+++ b/services/ui/ws/platform_display.h
@@ -15,6 +15,7 @@
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
+#include "services/ui/display/viewport_metrics.h"
 #include "services/ui/public/interfaces/cursor.mojom.h"
 #include "services/ui/public/interfaces/window_manager.mojom.h"
 #include "services/ui/public/interfaces/window_manager_constants.mojom.h"
@@ -65,10 +66,6 @@ class PlatformDisplay {
 
   virtual void Init(PlatformDisplayDelegate* delegate) = 0;
 
-  // Schedules a paint for the specified region in the coordinates of |window|.
-  virtual void SchedulePaint(const ServerWindow* window,
-                             const gfx::Rect& bounds) = 0;
-
   virtual void SetViewportSize(const gfx::Size& size) = 0;
 
   virtual void SetTitle(const base::string16& title) = 0;
@@ -82,9 +79,6 @@ class PlatformDisplay {
   virtual void UpdateTextInputState(const ui::TextInputState& state) = 0;
   virtual void SetImeVisibility(bool visible) = 0;
 
-  // Returns true if a compositor frame has been submitted but not drawn yet.
-  virtual bool IsFramePending() const = 0;
-
   virtual gfx::Rect GetBounds() const = 0;
 
   // Updates the viewport metrics for the display, returning true if any
@@ -124,8 +118,6 @@ class DefaultPlatformDisplay : public PlatformDisplay,
   // PlatformDisplay:
   void Init(PlatformDisplayDelegate* delegate) override;
   int64_t GetId() const override;
-  void SchedulePaint(const ServerWindow* window,
-                     const gfx::Rect& bounds) override;
   void SetViewportSize(const gfx::Size& size) override;
   void SetTitle(const base::string16& title) override;
   void SetCapture() override;
@@ -133,7 +125,6 @@ class DefaultPlatformDisplay : public PlatformDisplay,
   void SetCursorById(mojom::Cursor cursor) override;
   void UpdateTextInputState(const ui::TextInputState& state) override;
   void SetImeVisibility(bool visible) override;
-  bool IsFramePending() const override;
   gfx::Rect GetBounds() const override;
   bool UpdateViewportMetrics(const display::ViewportMetrics& metrics) override;
   const display::ViewportMetrics& GetViewportMetrics() const override;
@@ -162,7 +153,6 @@ class DefaultPlatformDisplay : public PlatformDisplay,
   void OnActivationChanged(bool active) override;
 
   // FrameGeneratorDelegate:
-  ServerWindow* GetRootWindow() override;
   bool IsInHighContrastMode() override;
 
   int64_t id_;