Merge remote-tracking branch 'retronym/topic/statify-chrome-trace' into topic/statify-chrome-trace

Author: retronym

src/reflect/scala/reflect/internal/util/ChromeTrace.scala

@@ -3,7 +3,6 @@ package scala.reflect.internal.util
 import java.io.Closeable
 import java.lang.management.ManagementFactory
 import java.nio.file.{Files, Path}
-import java.util
 import java.util.concurrent.TimeUnit
 
 import scala.collection.mutable
@@ -65,13 +64,15 @@ final class ChromeTrace(f: Path) extends Closeable {
     traceWriter.write("\n")
   }
 
+
   private def writePid(pidSuffix: String) = {
     if (pidSuffix == "")
       str("pid", pid)
     else
       str2("pid", pid, "-", pidSuffix)
   }
 
+
   def traceCounterEvent(name: String, counterName: String, count: Long, processWide: Boolean): Unit = {
     objStart()
     str("cat", "scalac")
@@ -161,8 +162,7 @@ final class ChromeTrace(f: Path) extends Closeable {
   }
 
   private def fld(name: String) = {
-    val topContext = context.top
-    topContext match {
+    context.top match {
       case oc @ ObjectContext(first) =>
         if (first) oc.first = false
         else traceWriter.write(",")