Rebuild test history databases when starting up performance_ui_tests.

chrome/test/perf/run_all_perfuitests.cc

Index: chrome/test/perf/run_all_perfuitests.cc
diff --git a/build/android/tests/multiple_proguards/src/dummy/DummyActivity.java b/chrome/test/perf/run_all_perfuitests.cc
similarity index 50%
copy from build/android/tests/multiple_proguards/src/dummy/DummyActivity.java
copy to chrome/test/perf/run_all_perfuitests.cc
index 291a8100f394307d471d69237eee321c2a5fcc7f..5ce62ab3ab2c71b393faec34c558d2c56ec2ac12 100644
--- a/build/android/tests/multiple_proguards/src/dummy/DummyActivity.java
+++ b/chrome/test/perf/run_all_perfuitests.cc
@@ -2,13 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package dummy;
+#include "chrome/test/perf/perf_ui_test_suite.h"
 
-import android.app.Activity;
-import android.os.Bundle;
-
-/**
- * Dummy activity to build apk.
- */
-public class DummyActivity extends Activity {
+int main(int argc, char **argv) {
+  base::PlatformThread::SetName("Tests_Main");
+  return PerfUITestSuite(argc, argv).Run();
 }
+