Upstream UmaSessionStats.

chrome/browser/android/metrics/uma_session_stats.cc

Index: chrome/browser/android/metrics/uma_session_stats.cc
diff --git a/chrome/browser/android/metrics/uma_session_stats.cc b/chrome/browser/android/metrics/uma_session_stats.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f4b29811e7aeb8da5680cb1cd7c526c1f0dfd6bc
--- /dev/null
+++ b/chrome/browser/android/metrics/uma_session_stats.cc
@@ -0,0 +1,199 @@
+// Copyright 2015 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 "chrome/browser/android/metrics/uma_session_stats.h"
+
+#include "base/android/jni_string.h"
+#include "base/command_line.h"
+#include "base/metrics/histogram.h"
+#include "base/prefs/pref_service.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/time/time.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
+#include "chrome/browser/metrics/metrics_services_manager.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/installer/util/google_update_settings.h"
+#include "components/metrics/metrics_service.h"
+#include "components/variations/metrics_util.h"
+#include "components/variations/variations_associated_data.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/user_metrics.h"
+#include "jni/UmaSessionStats_jni.h"
+
+using base::android::ConvertJavaStringToUTF8;
+using base::UserMetricsAction;
+
+namespace {
+UmaSessionStats* g_uma_session_stats = NULL;
+}  // namespace
+
+UmaSessionStats::UmaSessionStats()
+    : active_session_count_(0) {
+}
+
+UmaSessionStats::~UmaSessionStats() {
+}
+
+void UmaSessionStats::UmaResumeSession(JNIEnv* env, jobject obj) {
+  DCHECK(g_browser_process);
+
+  if (active_session_count_ == 0) {
+    session_start_time_ = base::TimeTicks::Now();
+
+    // Tell the metrics service that the application resumes.
+    metrics::MetricsService* metrics = g_browser_process->metrics_service();
+    if (metrics) {
+      metrics->OnAppEnterForeground();
+    }
+  }
+  ++active_session_count_;
+}
+
+void UmaSessionStats::UmaEndSession(JNIEnv* env, jobject obj) {
+  --active_session_count_;
+  DCHECK(active_session_count_ >= 0);
+
+  if (active_session_count_ == 0) {
+    base::TimeDelta duration = base::TimeTicks::Now() - session_start_time_;
+    UMA_HISTOGRAM_LONG_TIMES("Session.TotalDuration", duration);
+
+    DCHECK(g_browser_process);
+    // Tell the metrics service it was cleanly shutdown.
+    metrics::MetricsService* metrics = g_browser_process->metrics_service();
+    if (metrics) {
+      metrics->OnAppEnterBackground();
+    }
+  }
+}
+
+// static
+void UmaSessionStats::RegisterSyntheticFieldTrialWithNameHash(
+    uint32_t trial_name_hash,
+    const std::string& group_name) {
+  ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrialWithNameHash(
+      trial_name_hash, group_name);
+}
+
+// static
+void UmaSessionStats::RegisterSyntheticFieldTrial(
+    const std::string& trial_name,
+    const std::string& group_name) {
+  ChromeMetricsServiceAccessor::RegisterSyntheticFieldTrial(trial_name,
+                                                            group_name);
+}
+
+// Starts/stops the MetricsService when permissions have changed.
+// There are three possible states:
+// * Logs are being recorded and being uploaded to the server.
+// * Logs are being recorded, but not being uploaded to the server.
+//   This happens when we've got permission to upload on Wi-Fi but we're on a
+//   mobile connection (for example).
+// * Logs are neither being recorded or uploaded.
+static void UpdateMetricsServiceState(JNIEnv* env, jobject obj,
+    jboolean may_record, jboolean may_upload) {
+  metrics::MetricsService* metrics = g_browser_process->metrics_service();
+  DCHECK(metrics);
+
+  if (metrics->recording_active() != may_record) {
+    // This function puts a consent file with the ClientID in the
+    // data directory. The ID is passed to the renderer for crash
+    // reporting when things go wrong.
+    content::BrowserThread::GetBlockingPool()->PostTask(FROM_HERE,
+        base::Bind(
+            base::IgnoreResult(GoogleUpdateSettings::SetCollectStatsConsent),
+            may_record));
+  }
+
+  g_browser_process->GetMetricsServicesManager()->UpdatePermissions(
+      may_record, may_upload);
+}
+
+// Renderer process crashed in the foreground.
+static void LogRendererCrash(JNIEnv* env, jclass clazz, jboolean is_paused) {
+  DCHECK(g_browser_process);
+
+  if (!is_paused) {
+    // Increment the renderer crash count in stability metrics.
+    PrefService* pref = g_browser_process->local_state();
+    DCHECK(pref);
+    int value = pref->GetInteger(prefs::kStabilityRendererCrashCount);
+    pref->SetInteger(prefs::kStabilityRendererCrashCount, value + 1);
+  }
+
+  // Note: When we are paused, any UI metric we increment may not make it to
+  // the disk before we are killed. Treat the count below as a lower bound.
+  content::RecordAction(base::UserMetricsAction("MobileRendererCrashed"));
+}
+
+static void RegisterExternalExperiment(JNIEnv* env,
+                                       jclass clazz,
+                                       jint study_id,
+                                       jint experiment_id) {
+  const std::string group_name_utf8 = base::IntToString(experiment_id);
+
+  variations::ActiveGroupId active_group;
+  active_group.name = static_cast<uint32>(study_id);
+  active_group.group = metrics::HashName(group_name_utf8);
+  variations::AssociateGoogleVariationIDForceHashes(
+      variations::GOOGLE_WEB_PROPERTIES, active_group,
+      static_cast<variations::VariationID>(experiment_id));
+
+  UmaSessionStats::RegisterSyntheticFieldTrialWithNameHash(
+      static_cast<uint32_t>(study_id), group_name_utf8);
+}
+
+static void RegisterSyntheticFieldTrial(JNIEnv* env,
+                                        jclass clazz,
+                                        jstring jtrial_name,
+                                        jstring jgroup_name) {
+  std::string trial_name(ConvertJavaStringToUTF8(env, jtrial_name));
+  std::string group_name(ConvertJavaStringToUTF8(env, jgroup_name));
+  UmaSessionStats::RegisterSyntheticFieldTrial(trial_name, group_name);
+}
+
+static void RecordMultiWindowSession(JNIEnv*, jclass,
+                                     jint area_percent,
+                                     jint instance_count) {
+  UMA_HISTOGRAM_PERCENTAGE("MobileStartup.MobileMultiWindowSession",
+                           area_percent);
+  // Make sure the bucket count is the same as the range.  This currently
+  // expects no more than 10 simultaneous multi window instances.
+  UMA_HISTOGRAM_CUSTOM_COUNTS("MobileStartup.MobileMultiWindowInstances",
+                              instance_count,
+                              1 /* min */,
+                              10 /* max */,
+                              10 /* bucket count */);
+}
+
+static void RecordTabCountPerLoad(JNIEnv*, jclass, jint num_tabs) {
+  // Record how many tabs total are open.
+  UMA_HISTOGRAM_CUSTOM_COUNTS("Tabs.TabCountPerLoad", num_tabs, 1, 200, 50);
+}
+
+static void RecordPageLoaded(JNIEnv*, jclass, jboolean is_desktop_user_agent) {
+  // Should be called whenever a page has been loaded.
+  content::RecordAction(UserMetricsAction("MobilePageLoaded"));
+  if (is_desktop_user_agent) {
+    content::RecordAction(
+        UserMetricsAction("MobilePageLoadedDesktopUserAgent"));
+  }
+}
+
+static void RecordPageLoadedWithKeyboard(JNIEnv*, jclass) {
+  content::RecordAction(UserMetricsAction("MobilePageLoadedWithKeyboard"));
+}
+
+static jlong Init(JNIEnv* env, jclass obj) {
+  // We should have only one UmaSessionStats instance.
+  DCHECK(!g_uma_session_stats);
+  g_uma_session_stats = new UmaSessionStats();
+  return reinterpret_cast<intptr_t>(g_uma_session_stats);
+}
+
+// Register native methods
+bool RegisterUmaSessionStats(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}