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

content/browser/web_contents/web_contents_view_aura.h

Index: content/browser/web_contents/web_contents_view_aura.h
diff --git a/content/browser/web_contents/web_contents_view_aura.h b/content/browser/web_contents/web_contents_view_aura.h
index f184fb226b2675ec72b36ca31832aecbbc3c6c9e..1a0d6b2bfa3bb6ae309f5bd5e1a7dd0424c799b3 100644
--- a/content/browser/web_contents/web_contents_view_aura.h
+++ b/content/browser/web_contents/web_contents_view_aura.h
@@ -23,6 +23,7 @@ class Window;
 
 namespace ui {
 class DropTargetEvent;
+class TouchSelectionController;
 }
 
 namespace content {
@@ -31,7 +32,7 @@ class OverscrollNavigationOverlay;
 class RenderWidgetHostImpl;
 class RenderWidgetHostViewAura;
 class ShadowLayerDelegate;
-class TouchEditableImplAura;
+class TouchSelectionControllerClientAura;
 class WebContentsViewDelegate;
 class WebContentsImpl;
 class WebDragDestDelegate;
@@ -47,9 +48,6 @@ class WebContentsViewAura
   WebContentsViewAura(WebContentsImpl* web_contents,
                       WebContentsViewDelegate* delegate);
 
-  CONTENT_EXPORT void SetTouchEditableForTest(
-      TouchEditableImplAura* touch_editable);
-
  private:
   class WindowObserver;
 
@@ -70,10 +68,11 @@ class WebContentsViewAura
   // animates in, or the content window animates out).
   void CompleteOverscrollNavigation(OverscrollMode mode);
 
-  void AttachTouchEditableToRenderView();
-
   void OverscrollUpdateForWebContentsDelegate(float delta_y);
 
+  ui::TouchSelectionController* GetSelectionController() const;
+  TouchSelectionControllerClientAura* GetSelectionControllerClient() const;
+
   // Overridden from WebContentsView:
   gfx::NativeView GetNativeView() const override;
   gfx::NativeView GetContentNativeView() const override;
@@ -192,7 +191,6 @@ class WebContentsViewAura
   // navigation triggered by the overscroll gesture.
   scoped_ptr<OverscrollNavigationOverlay> navigation_overlay_;
 
-  scoped_ptr<TouchEditableImplAura> touch_editable_;
   scoped_ptr<GestureNavSimple> gesture_nav_simple_;
 
   // On Windows we can run into problems if resources get released within the