Move overscroll logic out of EventHandler.

third_party/WebKit/Source/core/frame/FrameHost.cpp

Index: third_party/WebKit/Source/core/frame/FrameHost.cpp
diff --git a/third_party/WebKit/Source/core/frame/FrameHost.cpp b/third_party/WebKit/Source/core/frame/FrameHost.cpp
index cf736ea33dd8bb65983927413a0da8a709e9915f..442e779ed57250755dc9df070f9bf202f1855ff9 100644
--- a/third_party/WebKit/Source/core/frame/FrameHost.cpp
+++ b/third_party/WebKit/Source/core/frame/FrameHost.cpp
@@ -35,6 +35,7 @@
 #include "core/frame/TopControls.h"
 #include "core/inspector/ConsoleMessageStorage.h"
 #include "core/page/Page.h"
+#include "core/page/scrolling/OverscrollController.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebScheduler.h"
 
@@ -50,6 +51,9 @@ FrameHost::FrameHost(Page& page)
     , m_topControls(TopControls::create(*this))
     , m_pageScaleConstraintsSet(PageScaleConstraintsSet::create())
     , m_visualViewport(VisualViewport::create(*this))
+    , m_overscrollController(OverscrollController::create(
+        *m_visualViewport,
+        m_page->chromeClient()))
     , m_eventHandlerRegistry(new EventHandlerRegistry(*this))
     , m_consoleMessageStorage(ConsoleMessageStorage::create())
     , m_subframeCount(0)
@@ -91,6 +95,11 @@ TopControls& FrameHost::topControls() const
     return *m_topControls;
 }
 
+OverscrollController& FrameHost::overscrollController() const
+{
+    return *m_overscrollController;
+}
+
 VisualViewport& FrameHost::visualViewport() const
 {
     return *m_visualViewport;
@@ -116,6 +125,7 @@ DEFINE_TRACE(FrameHost)
     visitor->trace(m_page);
     visitor->trace(m_topControls);
     visitor->trace(m_visualViewport);
+    visitor->trace(m_overscrollController);
     visitor->trace(m_eventHandlerRegistry);
     visitor->trace(m_consoleMessageStorage);
 }