components/cronet/android/histogram_manager.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/cronet/android/histogram_manager.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/android/jni_array.h"
  11 #include "components/metrics/histogram_manager.h"
  12
  13 #include "jni/HistogramManager_jni.h"
  14
  15 namespace cronet {
  16
  17 // Explicitly register static JNI functions.
  18 bool HistogramManagerRegisterJni(JNIEnv* env) {
  19   return RegisterNativesImpl(env);
  20 }
  21
  22 static jbyteArray GetHistogramDeltas(JNIEnv* env, jobject jcaller) {
  23   std::vector<uint8> data;
  24   if (!metrics::HistogramManager::GetInstance()->GetDeltas(&data))
  25     return NULL;
  26   return base::android::ToJavaByteArray(env, &data[0], data.size()).Release();
  27 }
  28
  29 }  // namespace cronet