Unify Android Webview and Chrome's fling

android_webview/browser/browser_view_renderer_client.h

Index: android_webview/browser/browser_view_renderer_client.h
diff --git a/android_webview/browser/browser_view_renderer_client.h b/android_webview/browser/browser_view_renderer_client.h
index c4bf8f259a6e90d7ee2804228d4514d5f59d41a9..3929448ba214da82c53130d92f7290d8c81cc43a 100644
--- a/android_webview/browser/browser_view_renderer_client.h
+++ b/android_webview/browser/browser_view_renderer_client.h
@@ -41,7 +41,7 @@ class BrowserViewRendererClient {
   virtual void ScrollContainerViewTo(gfx::Vector2d new_value) = 0;
 
   // Is a Android view system managed fling in progress?
-  virtual bool IsFlingActive() const = 0;
+  virtual bool IsSmoothScrollingActive() const = 0;
 
   // Sets the following:
   // view's scroll offset cap to |max_scroll_offset|,
@@ -55,7 +55,10 @@ class BrowserViewRendererClient {
                                  float max_page_scale_factor) = 0;
 
   // Handle overscroll.
-  virtual void DidOverscroll(gfx::Vector2d overscroll_delta) = 0;
+  virtual void DidOverscroll(gfx::Vector2d overscroll_delta,
+                             gfx::Vector2dF overscroll_velocity,
+                             bool first_overscroll_x,
+                             bool first_overscroll_y) = 0;
 
   // Visible for testing
   // Called when the parent draw constraints in browser view renderer gets