Use idle time to make progress on scheduled compilation jobs

src/compiler-dispatcher/compiler-dispatcher.h

Index: src/compiler-dispatcher/compiler-dispatcher.h
diff --git a/src/compiler-dispatcher/compiler-dispatcher.h b/src/compiler-dispatcher/compiler-dispatcher.h
index e6737a002945175bcaaefd3bcf6d25bec2232edc..7947a448b133d26477072a1fea95bb6d75e3f954 100644
--- a/src/compiler-dispatcher/compiler-dispatcher.h
+++ b/src/compiler-dispatcher/compiler-dispatcher.h
@@ -13,6 +13,9 @@
 #include "src/globals.h"
 
 namespace v8 {
+
+class Platform;
+
 namespace internal {
 
 class CompilerDispatcherJob;
@@ -27,7 +30,8 @@ class V8_EXPORT_PRIVATE CompilerDispatcher {
  public:
   enum class BlockingBehavior { kBlock, kDontBlock };
 
-  CompilerDispatcher(Isolate* isolate, size_t max_stack_size);
+  CompilerDispatcher(Isolate* isolate, Platform* platform,
+                     size_t max_stack_size);
   ~CompilerDispatcher();
 
   // Returns true if a job was enqueued.
@@ -50,12 +54,19 @@ class V8_EXPORT_PRIVATE CompilerDispatcher {
   typedef std::multimap<std::pair<int, int>,
                         std::unique_ptr<CompilerDispatcherJob>>
       JobMap;
+  class IdleTask;
+
   JobMap::const_iterator GetJobFor(Handle<SharedFunctionInfo> shared) const;
+  void ScheduleIdleTaskIfNeeded();
+  void DoIdleWork(double deadline_in_seconds);
 
   Isolate* isolate_;
+  Platform* platform_;
   size_t max_stack_size_;
   std::unique_ptr<CompilerDispatcherTracer> tracer_;
 
+  bool idle_task_scheduled_;
+
   // Mapping from (script id, function literal id) to job. We use a multimap,
   // as script id is not necessarily unique.
   JobMap jobs_;