cc: add DevTools instrumentation for impl-side frames

cc/scheduler/scheduler.h

Index: cc/scheduler/scheduler.h
diff --git a/cc/scheduler/scheduler.h b/cc/scheduler/scheduler.h
index e4a8bf3f9978a68f3a68b8852c1963abf0e09069..91ec6d19d55cf2a011e71c77a4c1309dfd41519d 100644
--- a/cc/scheduler/scheduler.h
+++ b/cc/scheduler/scheduler.h
@@ -60,8 +60,9 @@ class CC_EXPORT Scheduler {
  public:
   static scoped_ptr<Scheduler> Create(
       SchedulerClient* client,
-      const SchedulerSettings& scheduler_settings) {
-    return make_scoped_ptr(new Scheduler(client,  scheduler_settings));
+      const SchedulerSettings& scheduler_settings,
+      int tree_id) {
+    return make_scoped_ptr(new Scheduler(client, scheduler_settings, tree_id));
   }
 
   virtual ~Scheduler();
@@ -124,7 +125,8 @@ class CC_EXPORT Scheduler {
 
  private:
   Scheduler(SchedulerClient* client,
-            const SchedulerSettings& scheduler_settings);
+            const SchedulerSettings& scheduler_settings,
+            int tree_id);
 
   void PostBeginImplFrameDeadline(base::TimeTicks deadline);
   void SetupNextBeginImplFrameIfNeeded();
@@ -136,6 +138,7 @@ class CC_EXPORT Scheduler {
 
   const SchedulerSettings settings_;
   SchedulerClient* client_;
+  int tree_id_;

[nduca, 2013/11/06 19:05:12]

can we call this layer_tree_host_id throughout? We actually have LayerTrees
which are different than the hosts...

[caseq, 2013/11/07 06:36:26]

Sure, done (everywhere except devtools_instrumentation, where we were already
using it, as it should match the parameter name on the blink side).

 
   bool last_set_needs_begin_impl_frame_;
   BeginFrameArgs last_begin_impl_frame_args_;