Unit Test for WebView animating in and out of screen

android_webview/browser/browser_view_renderer.h

Index: android_webview/browser/browser_view_renderer.h
diff --git a/android_webview/browser/browser_view_renderer.h b/android_webview/browser/browser_view_renderer.h
index ee6aa29914b2c8fdca6fada0ab33a5f3bf0516b6..ba88f31833530cab6e431eac4a0d028251dffb33 100644
--- a/android_webview/browser/browser_view_renderer.h
+++ b/android_webview/browser/browser_view_renderer.h
@@ -112,6 +112,11 @@ class BrowserViewRenderer : public content::SynchronousCompositorClient {
   void DidSkipCommitFrame();
   void DetachFunctorFromView();
 
+  // Visible for testing.
+  const ParentCompositorDrawConstraints& parent_draw_constraints_for_testing() {
+    return parent_draw_constraints_;
+  }
+
  private:
   void SetTotalRootLayerScrollOffset(gfx::Vector2dF new_value_dip);
   bool CanOnDraw();