Remove cachedLocaleData from DecimalFormat.

This cache was removed upstream in
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/1d7a6adf499f,
and doesn't appear to be making a meaningful difference to
performance.

Benchmark results (product: hikey):

Before:
  Experiment {instrument=runtime, benchmarkMethod=time_instantiation, vm=default, parameters={}}
  Results:
    runtime(ns): min=198214.70, 1st qu.=198214.70, median=198214.70, mean=198214.70, 3rd qu.=198214.70, max=198214.70

After:
  Experiment {instrument=runtime, benchmarkMethod=time_instantiation, vm=default, parameters={}}
  Results:
    runtime(ns): min=197940.89, 1st qu.=197940.89, median=197940.89, mean=197940.89, 3rd qu.=197940.89, max=197940.89

Bug: 31930415
Test: m -j droid & ran benchmark
Change-Id: I83deaead58b7f79d2016fc68add2ec8b861414c7

1 files changed, 6 insertions, 0 deletions

diff --git a/benchmarks/src/benchmarks/regression/DecimalFormatBenchmark.java b/benchmarks/src/benchmarks/regression/DecimalFormatBenchmark.java
index 0c4aa77874..2436379094 100644
--- a/benchmarks/src/benchmarks/regression/DecimalFormatBenchmark.java
+++ b/benchmarks/src/benchmarks/regression/DecimalFormatBenchmark.java
@@ -153,4 +153,10 @@ public class DecimalFormatBenchmark {
     public void time_formatToCharacterIterator10e1000(int reps) {
         formatToCharacterIterator(BD10E1000, reps);
     }
+
+    public void time_instantiation(int reps) {
+        for (int i = 0; i < reps; i++) {
+            new DecimalFormat();
+        }
+    }
 }