Reland: Implement Aura side of unified touch text selection for contents

ui/aura/image_window_delegate.h

 // Copyright (c) 2013 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.
 
-#ifndef CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
-#define CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
+#ifndef UI_AURA_IMAGE_WINDOW_DELEGATE_H_
+#define UI_AURA_IMAGE_WINDOW_DELEGATE_H_
 
-#include "content/common/content_export.h"
+#include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/window_delegate.h"
 #include "ui/gfx/geometry/size.h"
+#include "ui/gfx/geometry/vector2d.h"
 #include "ui/gfx/image/image.h"
 
-namespace content {
+namespace aura {
 
-// An ImageWindowDelegate paints an image for a Window. The delegate destroys
-// itself when the Window is destroyed. The delegate does not consume any event.
-class CONTENT_EXPORT ImageWindowDelegate : public aura::WindowDelegate {
+// An ImageWindowDelegate paints an image for a Window, possibly also filling
+// the window with a specified backround color. By default the delegate destroys
+// itself when the Window is destroyed. Use |SetSelfDestroy| to override. The
+// delegate does not consume any event.
+class AURA_EXPORT ImageWindowDelegate : public aura::WindowDelegate {
  public:
   ImageWindowDelegate();
 
+  void SetBackgroundColor(SkColor color);
   void SetImage(const gfx::Image& image);
+  void SetImageOffset(gfx::Vector2d offset);
+
+  // Controls whether the delegate destroys itself when its window is destroyed.
+  void SetSelfDestroy(bool self_destroy);
+
   bool has_image() const { return !image_.IsEmpty(); }
 
  protected:
   ~ImageWindowDelegate() override;
 
   // Overridden from aura::WindowDelegate:
   gfx::Size GetMinimumSize() const override;
   gfx::Size GetMaximumSize() const override;
   void OnBoundsChanged(const gfx::Rect& old_bounds,
                        const gfx::Rect& new_bounds) override;
   gfx::NativeCursor GetCursor(const gfx::Point& point) override;
   int GetNonClientComponent(const gfx::Point& point) const override;
   bool ShouldDescendIntoChildForEventHandling(
       aura::Window* child,
       const gfx::Point& location) override;
   bool CanFocus() override;
   void OnCaptureLost() override;
   void OnPaint(gfx::Canvas* canvas) override;
   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
   void OnWindowDestroying(aura::Window* window) override;
   void OnWindowDestroyed(aura::Window* window) override;
   void OnWindowTargetVisibilityChanged(bool visible) override;
   bool HasHitTestMask() const override;
   void GetHitTestMask(gfx::Path* mask) const override;
 
  protected:
+  SkColor background_color_;
   gfx::Image image_;
+  gfx::Vector2d offset_;
+  bool self_destroy_;
+
   gfx::Size window_size_;
 
   // Keeps track of whether the window size matches the image size or not. If
   // the image size is smaller than the window size, then the delegate paints a
   // white background for the missing regions.
   bool size_mismatch_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageWindowDelegate);
 };
 
-}  // namespace content
+}  // namespace aura
 
-#endif  // CONTENT_BROWSER_WEB_CONTENTS_AURA_IMAGE_WINDOW_DELEGATE_H_
+#endif  // UI_AURA_IMAGE_WINDOW_DELEGATE_H_