scheduler: Tell v8 about the current RAIL mode

components/scheduler/renderer/renderer_scheduler.cc

Index: components/scheduler/renderer/renderer_scheduler.cc
diff --git a/components/scheduler/renderer/renderer_scheduler.cc b/components/scheduler/renderer/renderer_scheduler.cc
index 5733ce6c250019869b12aac35be6551e8659d7e3..dd7badeeed3c689daeb6230332a4c8351326e3ac 100644
--- a/components/scheduler/renderer/renderer_scheduler.cc
+++ b/components/scheduler/renderer/renderer_scheduler.cc
@@ -28,6 +28,8 @@ RendererScheduler::RendererScheduler() {
 RendererScheduler::~RendererScheduler() {
 }
 
+RendererScheduler::RAILModeObserver::~RAILModeObserver() = default;
+
 // static
 std::unique_ptr<RendererScheduler> RendererScheduler::Create() {
   // Ensure worker.scheduler, worker.scheduler.debug and
@@ -59,29 +61,6 @@ std::unique_ptr<RendererScheduler> RendererScheduler::Create() {
 }
 
 // static
-const char* RendererScheduler::UseCaseToString(UseCase use_case) {
-  switch (use_case) {
-    case UseCase::NONE:
-      return "none";
-    case UseCase::COMPOSITOR_GESTURE:
-      return "compositor_gesture";
-    case UseCase::MAIN_THREAD_CUSTOM_INPUT_HANDLING:
-      return "main_thread_custom_input_handling";
-    case UseCase::SYNCHRONIZED_GESTURE:
-      return "synchronized_gesture";
-    case UseCase::TOUCHSTART:
-      return "touchstart";
-    case UseCase::LOADING:
-      return "loading";
-    case UseCase::MAIN_THREAD_GESTURE:
-      return "main_thread_gesture";
-    default:
-      NOTREACHED();
-      return nullptr;
-  }
-}
-
-// static
 const char* RendererScheduler::InputEventStateToString(
     InputEventState input_event_state) {
   switch (input_event_state) {