Revert "Add UMA Histogram Manager to Cronet."

components/metrics/histogram_manager_unittest.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "components/metrics/histogram_manager.h"
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace metrics {
-
-// TODO(mef): crbug.com/441441. Move components/metrics/histogram_manager.*
-// files into components/android/cronet.
-TEST(HistogramManager, HistogramBucketFields) {
-  // Capture histograms at the start of the test to avoid later GetDeltas()
-  // calls picking them up.
-  std::vector<uint8> data_init;
-  HistogramManager::GetInstance()->GetDeltas(&data_init);
-
-  // kNoFlags filter should record all histograms.
-  UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager", 1, 2);
-
-  std::vector<uint8> data;
-  EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data));
-  EXPECT_FALSE(data.empty());
-  ChromeUserMetricsExtension uma_proto;
-  EXPECT_TRUE(uma_proto.ParseFromArray(
-      reinterpret_cast<const char*>(&data[0]), data.size()));
-  EXPECT_FALSE(data.empty());
-
-  const HistogramEventProto& histogram_proto =
-      uma_proto.histogram_event(uma_proto.histogram_event_size() - 1);
-  ASSERT_EQ(1, histogram_proto.bucket_size());
-  EXPECT_LE(0, histogram_proto.bucket(0).min());
-  EXPECT_LE(2, histogram_proto.bucket(0).max());
-  EXPECT_EQ(1, histogram_proto.bucket(0).count());
-
-  UMA_HISTOGRAM_ENUMERATION("UmaHistogramManager2", 2, 3);
-  std::vector<uint8> data2;
-  EXPECT_TRUE(HistogramManager::GetInstance()->GetDeltas(&data2));
-  EXPECT_FALSE(data2.empty());
-  ChromeUserMetricsExtension uma_proto2;
-  EXPECT_TRUE(uma_proto2.ParseFromArray(
-      reinterpret_cast<const char*>(&data2[0]), data2.size()));
-  EXPECT_FALSE(data2.empty());
-
-  const HistogramEventProto& histogram_proto2 =
-      uma_proto2.histogram_event(uma_proto2.histogram_event_size() - 1);
-  ASSERT_EQ(1, histogram_proto2.bucket_size());
-  EXPECT_LE(0, histogram_proto2.bucket(0).min());
-  EXPECT_LE(3, histogram_proto2.bucket(0).max());
-  EXPECT_EQ(1, histogram_proto2.bucket(0).count());
-}
-
-}  // namespace metrics