Adding phase info to wheel events migrated to wheel phase handler class.

content/browser/renderer_host/render_widget_host_view_android.h

Index: content/browser/renderer_host/render_widget_host_view_android.h
diff --git a/content/browser/renderer_host/render_widget_host_view_android.h b/content/browser/renderer_host/render_widget_host_view_android.h
index 25c9185b5a1632f3e7494dcc65dace54f6022010..e551ed5f9a073b0ed894be2b6d2127d1eef7f2b6 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.h
+++ b/content/browser/renderer_host/render_widget_host_view_android.h
@@ -25,6 +25,7 @@
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/android/content_view_core_impl_observer.h"
 #include "content/browser/renderer_host/input/stylus_text_selector.h"
+#include "content/browser/renderer_host/mouse_wheel_phase_handler.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/browser/renderer_host/text_input_manager.h"
 #include "content/common/content_export.h"
@@ -429,6 +430,8 @@ class CONTENT_EXPORT RenderWidgetHostViewAndroid
 
   base::ObserverList<DestructionObserver> destruction_observers_;
 
+  std::unique_ptr<MouseWheelPhaseHandler> mouse_wheel_phase_handler_;
+
   base::WeakPtrFactory<RenderWidgetHostViewAndroid> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);