Unit Test for WebView animating in and out of screen

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 ffc15b65aac333281d136875f71420458de27e11..33d84c310152d8a0916621d25c541971f4086425 100644
--- a/android_webview/browser/browser_view_renderer_client.h
+++ b/android_webview/browser/browser_view_renderer_client.h
@@ -54,6 +54,11 @@ class BrowserViewRendererClient {
   // Handle overscroll.
   virtual void DidOverscroll(gfx::Vector2d overscroll_delta) = 0;
 
+  // Visible for testing
+  // Called when the parent draw constraints in browser view renderer gets
+  // updated.
+  virtual void ParentDrawConstraintsUpdated() = 0;
+
  protected:
   virtual ~BrowserViewRendererClient() {}
 };