android: move overscroll effects to ui/

ui/android/overscroll_refresh.h

 // Copyright 2014 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_ANDROID_OVERSCROLL_REFRESH_H_
-#define CONTENT_BROWSER_ANDROID_OVERSCROLL_REFRESH_H_
+#ifndef UI_ANDROID_OVERSCROLL_REFRESH_H_
+#define UI_ANDROID_OVERSCROLL_REFRESH_H_
 
 #include "base/macros.h"
-#include "content/common/content_export.h"
+#include "ui/android/ui_android_export.h"
 #include "ui/gfx/geometry/size_f.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
-namespace content {
+namespace ui {
 
-class CONTENT_EXPORT OverscrollRefreshHandler {
+class UI_ANDROID_EXPORT OverscrollRefreshHandler {
  public:
   // Signals the start of an overscrolling pull. Returns whether the handler
   // will consume the overscroll gesture, in which case it will receive the
   // remaining pull updates.
   virtual bool PullStart() = 0;
 
   // Signals a pull update, where |delta| is in device pixels.
   virtual void PullUpdate(float delta) = 0;
 
   // Signals the release of the pull, and whether the release is allowed to
   // trigger the refresh action.
   virtual void PullRelease(bool allow_refresh) = 0;
 
   // Reset the active pull state.
   virtual void PullReset() = 0;
 
  protected:
   virtual ~OverscrollRefreshHandler() {}
 };
 
 // Simple pull-to-refresh styled effect. Listens to scroll events, conditionally
 // activating when:
 //   1) The scroll begins when the page's root layer 1) has no vertical scroll
 //      offset and 2) lacks the overflow-y:hidden property.
 //   2) The page doesn't consume the initial scroll events.
 //   3) The initial scroll direction is upward.
 // The actuall pull response, animation and action are delegated to the
 // provided refresh handler.
-class CONTENT_EXPORT OverscrollRefresh {
+class UI_ANDROID_EXPORT OverscrollRefresh {
  public:
   // Minmum number of overscrolling pull events required to activate the effect.
   // Useful for avoiding accidental triggering when a scroll janks (is delayed),
   // capping the impulse per event.
   enum { kMinPullsToActivate = 3 };
 
   explicit OverscrollRefresh(OverscrollRefreshHandler* handler);
   ~OverscrollRefresh();
 
   // Scroll event stream listening methods.
@@ skipping 39 matching lines @@
     ENABLED,
   } scroll_consumption_state_;
 
   OverscrollRefreshHandler* const handler_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollRefresh);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_BROWSER_ANDROID_OVERSCROLL_REFRESH_H_
+#endif  // UI_ANDROID_OVERSCROLL_REFRESH_H_