Separate SwipeRefreshHandler and ContentViewCore

ui/android/overscroll_refresh.h

Index: ui/android/overscroll_refresh.h
diff --git a/ui/android/overscroll_refresh.h b/ui/android/overscroll_refresh.h
index 451805ed7c02c3d58b5a20ad3b7bdcab20887c5a..b5a36f8e96de783a7a02b62fb6a06ec005a4d91e 100644
--- a/ui/android/overscroll_refresh.h
+++ b/ui/android/overscroll_refresh.h
@@ -5,6 +5,7 @@
 #ifndef UI_ANDROID_OVERSCROLL_REFRESH_H_
 #define UI_ANDROID_OVERSCROLL_REFRESH_H_
 
+#include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "ui/android/ui_android_export.h"
 #include "ui/gfx/geometry/size_f.h"
@@ -12,27 +13,6 @@
 
 namespace ui {
 
-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
@@ -48,7 +28,7 @@ class UI_ANDROID_EXPORT OverscrollRefresh {
   // capping the impulse per event.
   enum { kMinPullsToActivate = 3 };
 
-  explicit OverscrollRefresh(OverscrollRefreshHandler* handler);
+  explicit OverscrollRefresh(const base::android::JavaRef<jobject>& handler);
   ~OverscrollRefresh();
 
   // Scroll event stream listening methods.
@@ -94,7 +74,7 @@ class UI_ANDROID_EXPORT OverscrollRefresh {
     ENABLED,
   } scroll_consumption_state_;
 
-  OverscrollRefreshHandler* const handler_;
+  const base::android::ScopedJavaGlobalRef<jobject> handler_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollRefresh);
 };