VM: Re-format to use at most one newline between functions

runtime/vm/timeline_analysis.h

Index: runtime/vm/timeline_analysis.h
diff --git a/runtime/vm/timeline_analysis.h b/runtime/vm/timeline_analysis.h
index ca1424b4d6550528cf99e451d3cb831bd6e33961..a4700843fb8199fe3b4348b82517c97aa648ff00 100644
--- a/runtime/vm/timeline_analysis.h
+++ b/runtime/vm/timeline_analysis.h
@@ -31,7 +31,6 @@ class TimelineAnalysisThread : public ZoneAllocated {
   friend class TimelineAnalysis;
 };
 
-
 class TimelineAnalysisThreadEventIterator : public ValueObject {
  public:
   explicit TimelineAnalysisThreadEventIterator(TimelineAnalysisThread* thread);
@@ -50,7 +49,6 @@ class TimelineAnalysisThreadEventIterator : public ValueObject {
   intptr_t event_cursor_;
 };
 
-
 // Base of all timeline analysis classes. Base functionality:
 // - discovery of all thread ids in a recording.
 // - collecting all ThreadEventBlocks by thread id.
@@ -90,7 +88,6 @@ class TimelineAnalysis : public ValueObject {
   ZoneGrowableArray<TimelineAnalysisThread*> threads_;
 };
 
-
 class TimelineLabelPauseInfo : public ZoneAllocated {
  public:
   explicit TimelineLabelPauseInfo(const char* name);
@@ -147,7 +144,6 @@ class TimelineLabelPauseInfo : public ZoneAllocated {
   friend class TimelinePauseTrace;
 };
 
-
 class TimelinePauses : public TimelineAnalysis {
  public:
   TimelinePauses(Zone* zone, Isolate* isolate, TimelineEventRecorder* recorder);
@@ -190,7 +186,6 @@ class TimelinePauses : public TimelineAnalysis {
   ZoneGrowableArray<TimelineLabelPauseInfo*> labels_;
 };
 
-
 class TimelinePauseTrace : public ValueObject {
  public:
   TimelinePauseTrace();