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

content/browser/renderer_host/render_widget_host_view_aura.h

Index: content/browser/renderer_host/render_widget_host_view_aura.h
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.h b/content/browser/renderer_host/render_widget_host_view_aura.h
index d3e72e276c095cad708097abc5a6c84aad00f730..6f9a32ae9f6cba788d9c554a87a232fe46ae7133 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.h
+++ b/content/browser/renderer_host/render_widget_host_view_aura.h
@@ -65,6 +65,8 @@ class CompositorLock;
 class InputMethod;
 class LocatedEvent;
 class Texture;
+class TouchSelectionControllerAura;
+class TouchSelectionControllerAuraClient;
 }
 
 namespace content {
@@ -90,49 +92,6 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
       public aura::client::FocusChangeObserver,
       public aura::client::CursorClientObserver {
  public:
-  // Displays and controls touch editing elements such as selection handles.
-  class TouchEditingClient {
-   public:
-    TouchEditingClient() {}
-
-    // Tells the client to start showing touch editing handles.
-    virtual void StartTouchEditing() = 0;
-
-    // Notifies the client that touch editing is no longer needed. |quick|
-    // determines whether the handles should fade out quickly or slowly.
-    virtual void EndTouchEditing(bool quick) = 0;
-
-    // Notifies the client that the selection bounds need to be updated.
-    virtual void OnSelectionOrCursorChanged(
-        const ui::SelectionBound& anchor,
-        const ui::SelectionBound& focus) = 0;
-
-    // Notifies the client that the current text input type as changed.
-    virtual void OnTextInputTypeChanged(ui::TextInputType type) = 0;
-
-    // Notifies the client that an input event is about to be sent to the
-    // renderer. Returns true if the client wants to stop event propagation.
-    virtual bool HandleInputEvent(const ui::Event* event) = 0;
-
-    // Notifies the client that a gesture event ack was received.
-    virtual void GestureEventAck(int gesture_event_type) = 0;
-
-    // Notifies the client that the fling has ended, so it can activate touch
-    // editing if needed.
-    virtual void DidStopFlinging() = 0;
-
-    // This is called when the view is destroyed, so that the client can
-    // perform any necessary clean-up.
-    virtual void OnViewDestroyed() = 0;
-
-   protected:
-    virtual ~TouchEditingClient() {}
-  };
-
-  void set_touch_editing_client(TouchEditingClient* client) {
-    touch_editing_client_ = client;
-  }
-
   // When |is_guest_view_hack| is true, this view isn't really the view for
   // the |widget|, a RenderWidgetHostViewGuest is.
   //
@@ -352,6 +311,13 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
 
   void SnapToPhysicalPixelBoundary();
 
+  void InitSelectionController(
+      ui::TouchSelectionControllerAuraClient* selection_controller_client);
+
+  ui::TouchSelectionControllerAura* selection_controller() const {
+    return selection_controller_.get();
+  }
+
   OverscrollController* overscroll_controller() const {
     return overscroll_controller_.get();
   }
@@ -496,6 +462,11 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
 
   RenderFrameHostImpl* GetFocusedFrame();
 
+  // Helper function to be called whenever new selection bound information is
+  // received. It will update selection controller and notify IME.
+  void SelectionBoundsUpdated(const ui::SelectionBound& start,
+                              const ui::SelectionBound& end);
+
   // The model object.
   RenderWidgetHostImpl* host_;
 
@@ -545,8 +516,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
   bool can_compose_inline_;
 
   // Bounds for the selection.
-  ui::SelectionBound selection_anchor_;
-  ui::SelectionBound selection_focus_;
+  ui::SelectionBound selection_start_;
+  ui::SelectionBound selection_end_;
 
   // The current composition character bounds.
   std::vector<gfx::Rect> composition_character_bounds_;
@@ -626,7 +597,9 @@ class CONTENT_EXPORT RenderWidgetHostViewAura
 
   bool has_snapped_to_boundary_;
 
-  TouchEditingClient* touch_editing_client_;
+  scoped_ptr<ui::TouchSelectionControllerAuraClient>
+      selection_controller_client_;
+  scoped_ptr<ui::TouchSelectionControllerAura> selection_controller_;
 
   scoped_ptr<OverscrollController> overscroll_controller_;