DevTools: [Android] implement RenderWidgetHostViewAndroid::CopyFromCompositingSurface

content/port/browser/render_view_host_delegate_view.h

Index: content/port/browser/render_view_host_delegate_view.h
diff --git a/content/port/browser/render_view_host_delegate_view.h b/content/port/browser/render_view_host_delegate_view.h
index 5e5d9b4d11e0598832c0090e0d3a838a1fb1ec5b..244385922b895dfd8354b42a51dcfbb21cc8dfd3 100644
--- a/content/port/browser/render_view_host_delegate_view.h
+++ b/content/port/browser/render_view_host_delegate_view.h
@@ -68,6 +68,9 @@ class CONTENT_EXPORT RenderViewHostDelegateView {
   // retrieved by doing a Shift-Tab.
   virtual void TakeFocus(bool reverse) {}
 
+  // Take screenshot.
+  virtual bool GrabSnapshot(std::vector<uint8>* png) { return false; }
+
  protected:
   virtual ~RenderViewHostDelegateView() {}
 };