Reapply "Add a switch to enable composited scrolling for frames and enable it on Android"

content/browser/android/content_startup_flags.cc

Index: content/browser/android/content_startup_flags.cc
diff --git a/content/browser/android/content_startup_flags.cc b/content/browser/android/content_startup_flags.cc
index 2a630ccd91aa72be923efd932eb851a97cb48ae4..3e0ee61af2a669a87247093f83b65e7f94af0c20 100644
--- a/content/browser/android/content_startup_flags.cc
+++ b/content/browser/android/content_startup_flags.cc
@@ -51,6 +51,10 @@ void SetContentCommandLineFlags(int max_render_process_count) {
   parsed_command_line->AppendSwitch(
       switches::kEnableCompositingForFixedPosition);
   parsed_command_line->AppendSwitch(switches::kEnableAcceleratedOverflowScroll);
+  parsed_command_line->AppendSwitch(
+      switches::kEnableAcceleratedScrollableFrames);
+  parsed_command_line->AppendSwitch(
+      switches::kEnableCompositedScrollingForFrames);
 
   parsed_command_line->AppendSwitch(switches::kEnableGestureTapHighlight);
   parsed_command_line->AppendSwitch(switches::kEnableCssTransformPinch);