Add API to route end of fling messages from WebLayerTreeView to InputHandler

cc/test/fake_proxy.h

Index: cc/test/fake_proxy.h
diff --git a/cc/test/fake_proxy.h b/cc/test/fake_proxy.h
index c89f120643a1b52b987d1fd788c603f143167439..c23efaaf6daa1a9bd5eb5c267e5b2b24a02eb9ed 100644
--- a/cc/test/fake_proxy.h
+++ b/cc/test/fake_proxy.h
@@ -31,6 +31,7 @@ public:
     virtual void setNeedsRedraw() OVERRIDE { }
     virtual void setDeferCommits(bool) OVERRIDE { }
     virtual void didAddAnimation() OVERRIDE { }
+    virtual void mainThreadHasStoppedFlinging() OVERRIDE { }
     virtual bool commitRequested() const OVERRIDE;
     virtual void start() OVERRIDE { }
     virtual void stop() OVERRIDE { }