Let MetricsService know about some Android Activities

chrome/browser/metrics/metrics_service_android.cc

Index: chrome/browser/metrics/metrics_service_android.cc
diff --git a/chrome/browser/metrics/metrics_service_android.cc b/chrome/browser/metrics/metrics_service_android.cc
new file mode 100644
index 0000000000000000000000000000000000000000..8f08071ed8299d50e578bb9ed1cfc5a5ffdc2f03
--- /dev/null
+++ b/chrome/browser/metrics/metrics_service_android.cc
@@ -0,0 +1,129 @@
+// Copyright 2013 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/metrics/metrics_service.h"
+
+#include "base/metrics/histogram.h"
+#include "base/prefs/pref_registry_simple.h"
+#include "base/prefs/pref_service.h"
+#include "chrome/browser/android/activity_type_ids.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/common/pref_names.h"
+
+// static
+void MetricsService::RegisterPrefsAndroid(PrefRegistrySimple* registry) {
+  registry->RegisterIntegerPref(prefs::kStabilityForegroundActivity,
+                                ActivityTypeIds::ACTIVITY_NONE);
+  registry->RegisterIntegerPref(prefs::kStabilityLaunchedActivityFlags,
+                                ActivityTypeIds::ACTIVITY_NONE);
+
+  registry->RegisterIntegerPref(prefs::kStabilityLaunchCountMainActivity, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityLaunchCountFullScreenActivity,
+                                0);
+
+  registry->RegisterIntegerPref(prefs::kStabilityCrashCountMainActivity, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityCrashCountFullScreenActivity,
+                                0);
+}
+
+void MetricsService::RecordAndroidStabilityPrefs() {
+  PrefService* pref = g_browser_process->local_state();
+
+  // Track which Activities were launched by the user.
+  int launched_activities =
+      pref->GetInteger(prefs::kStabilityLaunchedActivityFlags);
+  if (launched_activities & ActivityTypeIds::ACTIVITY_MAIN)
+    IncrementPrefValue(prefs::kStabilityLaunchCountMainActivity);
+  if (launched_activities & ActivityTypeIds::ACTIVITY_FULLSCREEN)
+    IncrementPrefValue(prefs::kStabilityLaunchCountFullScreenActivity);
+
+  pref->SetInteger(prefs::kStabilityLaunchedActivityFlags,
+                   ActivityTypeIds::ACTIVITY_NONE);
+
+  // If an Activity was in the foreground when Chrome died, then Chrome was
+  // improperly shut down.  Record it as a crash for that particular Activity.
+  int foreground = pref->GetInteger(prefs::kStabilityForegroundActivity);
+  switch (foreground) {
+    case ActivityTypeIds::ACTIVITY_MAIN:
+      IncrementPrefValue(prefs::kStabilityCrashCountMainActivity);
+      break;
+    case ActivityTypeIds::ACTIVITY_FULLSCREEN:
+      IncrementPrefValue(prefs::kStabilityCrashCountFullScreenActivity);
+      break;
+    default:
+      break;
+  }
+  pref->SetInteger(prefs::kStabilityForegroundActivity,
+                   ActivityTypeIds::ACTIVITY_NONE);
+}
+
+void MetricsService::RecordAndroidStabilityHistograms() {
+  PrefService* pref = g_browser_process->local_state();
+
+  // Track which Activities were launched by the user.
+  int main_launch_count =
+      pref->GetInteger(prefs::kStabilityLaunchCountMainActivity);
+  for (int i = 0; i < main_launch_count; ++i) {
+    UMA_HISTOGRAM_ENUMERATION("Chrome.Android.Activity.LaunchCounts",
+                              ActivityTypeIds::ACTIVITY_MAIN,
+                              ActivityTypeIds::ACTIVITY_MAX_VALUE);

[Ilya Sherman, 2013/12/17 02:13:44]

It looks like this histogram only has two buckets, but you're allocating space
for 4 buckets instead.  Do you plan to ever actually OR together ACTIVITY_MAIN
and ACTIVITY_FULLSCREEN for this histogram?  If not, please define a separate
enum specifically for use with the histogram, and use that here.  (It doesn't
matter too much while there are only 2 activities, but if the list were to ever
grow, exponential explosion in the size of the allocated vector is not a good
place to be in.)

[gone, 2013/12/18 23:46:01]

Split it apart, but it got a bit messy.

[Ilya Sherman, 2013/12/19 00:36:36]

Thanks!

+  }
+  pref->SetInteger(prefs::kStabilityLaunchCountMainActivity, 0);
+
+  int full_screen_launch_count =
+      pref->GetInteger(prefs::kStabilityLaunchCountFullScreenActivity);
+  for (int i = 0; i < full_screen_launch_count; ++i) {
+    UMA_HISTOGRAM_ENUMERATION("Chrome.Android.Activity.LaunchCounts",
+                              ActivityTypeIds::ACTIVITY_FULLSCREEN,
+                              ActivityTypeIds::ACTIVITY_MAX_VALUE);
+  }
+  pref->SetInteger(prefs::kStabilityLaunchCountFullScreenActivity, 0);
+
+  // Track which Activities were in the foreground when Chrome died.
+  int main_crash_count =
+      pref->GetInteger(prefs::kStabilityCrashCountMainActivity);
+  for (int i = 0; i < main_crash_count; ++i) {
+    UMA_HISTOGRAM_ENUMERATION("Chrome.Android.Activity.CrashCounts",
+                              ActivityTypeIds::ACTIVITY_MAIN,
+                              ActivityTypeIds::ACTIVITY_MAX_VALUE);
+  }
+  pref->SetInteger(prefs::kStabilityCrashCountMainActivity, 0);
+
+  int full_screen_crash_count =
+      pref->GetInteger(prefs::kStabilityCrashCountFullScreenActivity);
+  for (int i = 0; i < full_screen_crash_count; ++i) {
+    UMA_HISTOGRAM_ENUMERATION("Chrome.Android.Activity.CrashCounts",
+                              ActivityTypeIds::ACTIVITY_FULLSCREEN,
+                              ActivityTypeIds::ACTIVITY_MAX_VALUE);
+  }
+  pref->SetInteger(prefs::kStabilityCrashCountFullScreenActivity, 0);
+}
+
+void MetricsService::OnForegroundActivityChanged(ActivityTypeIds::Type type) {
+  PrefService* pref = g_browser_process->local_state();
+
+  // Record that the Activity is now in the foreground.
+  pref->SetInteger(prefs::kStabilityForegroundActivity, type);
+
+  // Record that the Activity was launched.
+  int launched_activities =
+      pref->GetInteger(prefs::kStabilityLaunchedActivityFlags) | type;
+  pref->SetInteger(prefs::kStabilityLaunchedActivityFlags, launched_activities);
+
+  pref->CommitPendingWrite();
+}
+
+// static
+void MetricsService::DiscardOldStabilityStatsAndroid(PrefService* local_state) {
+  local_state->SetInteger(prefs::kStabilityForegroundActivity,
+                          ActivityTypeIds::ACTIVITY_NONE);
+  local_state->SetInteger(prefs::kStabilityLaunchedActivityFlags,
+                          ActivityTypeIds::ACTIVITY_NONE);
+
+  local_state->SetInteger(prefs::kStabilityLaunchCountMainActivity, 0);
+  local_state->SetInteger(prefs::kStabilityLaunchCountFullScreenActivity, 0);
+
+  local_state->SetInteger(prefs::kStabilityCrashCountMainActivity, 0);
+  local_state->SetInteger(prefs::kStabilityCrashCountFullScreenActivity, 0);
+}