Gather stability prefs into managing objects.

components/metrics/stability_metrics_provider.cc

Index: components/metrics/stability_metrics_provider.cc
diff --git a/components/metrics/stability_metrics_provider.cc b/components/metrics/stability_metrics_provider.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a4b528089d2593c016ddad48648654e3f97bcf9c
--- /dev/null
+++ b/components/metrics/stability_metrics_provider.cc
@@ -0,0 +1,179 @@
+// Copyright 2017 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/stability_metrics_provider.h"
+
+#include "base/metrics/histogram_macros.h"
+#include "components/metrics/metrics_pref_names.h"
+#include "components/metrics/proto/system_profile.pb.h"
+#include "components/prefs/pref_registry_simple.h"
+#include "components/prefs/pref_service.h"
+
+namespace metrics {
+
+StabilityMetricsProvider::StabilityMetricsProvider(PrefService* local_state)
+    : local_state_(local_state) {}
+
+StabilityMetricsProvider::~StabilityMetricsProvider() = default;
+
+// static
+void StabilityMetricsProvider::RegisterPrefs(PrefRegistrySimple* registry) {
+  registry->RegisterIntegerPref(prefs::kStabilityCrashCount, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityIncompleteSessionEndCount, 0);
+  registry->RegisterBooleanPref(prefs::kStabilitySessionEndCompleted, true);
+  registry->RegisterIntegerPref(prefs::kStabilityLaunchCount, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityBreakpadRegistrationFail, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityBreakpadRegistrationSuccess,
+                                0);
+  registry->RegisterIntegerPref(prefs::kStabilityDebuggerPresent, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityDebuggerNotPresent, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityDeferredCount, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityDiscardCount, 0);
+  registry->RegisterIntegerPref(prefs::kStabilityVersionMismatchCount, 0);
+}
+
+void StabilityMetricsProvider::ClearSavedStabilityMetrics() {
+  local_state_->SetInteger(prefs::kStabilityCrashCount, 0);
+  local_state_->SetInteger(prefs::kStabilityIncompleteSessionEndCount, 0);
+  local_state_->SetInteger(prefs::kStabilityBreakpadRegistrationSuccess, 0);
+  local_state_->SetInteger(prefs::kStabilityBreakpadRegistrationFail, 0);
+  local_state_->SetInteger(prefs::kStabilityDebuggerPresent, 0);
+  local_state_->SetInteger(prefs::kStabilityDebuggerNotPresent, 0);
+  local_state_->SetInteger(prefs::kStabilityLaunchCount, 0);
+  local_state_->SetBoolean(prefs::kStabilitySessionEndCompleted, true);
+  local_state_->SetInteger(prefs::kStabilityDeferredCount, 0);
+  // Note: kStabilityDiscardCount is not cleared as its intent is to measure
+  // the number of times data is discarded, even across versions.
+  local_state_->SetInteger(prefs::kStabilityVersionMismatchCount, 0);
+}
+
+void StabilityMetricsProvider::ProvideStabilityMetrics(
+    SystemProfileProto* system_profile) {
+  SystemProfileProto::Stability* stability =
+      system_profile->mutable_stability();
+
+  int launch_count = local_state_->GetInteger(prefs::kStabilityLaunchCount);
+  if (launch_count) {
+    local_state_->SetInteger(prefs::kStabilityLaunchCount, 0);
+    stability->set_launch_count(launch_count);
+  }
+  int crash_count = local_state_->GetInteger(prefs::kStabilityCrashCount);
+  if (crash_count) {
+    local_state_->SetInteger(prefs::kStabilityCrashCount, 0);
+    stability->set_crash_count(crash_count);
+  }
+
+  int incomplete_shutdown_count =
+      local_state_->GetInteger(prefs::kStabilityIncompleteSessionEndCount);
+  if (incomplete_shutdown_count) {
+    local_state_->SetInteger(prefs::kStabilityIncompleteSessionEndCount, 0);
+    stability->set_incomplete_shutdown_count(incomplete_shutdown_count);
+  }
+
+  int breakpad_registration_success_count =
+      local_state_->GetInteger(prefs::kStabilityBreakpadRegistrationSuccess);
+  if (breakpad_registration_success_count) {
+    local_state_->SetInteger(prefs::kStabilityBreakpadRegistrationSuccess, 0);
+    stability->set_breakpad_registration_success_count(
+        breakpad_registration_success_count);
+  }
+
+  int breakpad_registration_failure_count =
+      local_state_->GetInteger(prefs::kStabilityBreakpadRegistrationFail);
+  if (breakpad_registration_failure_count) {
+    local_state_->SetInteger(prefs::kStabilityBreakpadRegistrationFail, 0);
+    stability->set_breakpad_registration_failure_count(
+        breakpad_registration_failure_count);
+  }
+
+  int debugger_present_count =
+      local_state_->GetInteger(prefs::kStabilityDebuggerPresent);
+  if (debugger_present_count) {
+    local_state_->SetInteger(prefs::kStabilityDebuggerPresent, 0);
+    stability->set_debugger_present_count(debugger_present_count);
+  }
+
+  int debugger_not_present_count =
+      local_state_->GetInteger(prefs::kStabilityDebuggerNotPresent);
+  if (debugger_not_present_count) {
+    local_state_->SetInteger(prefs::kStabilityDebuggerNotPresent, 0);
+    stability->set_debugger_not_present_count(debugger_not_present_count);
+  }
+
+  // Note: only logging the following histograms for non-zero values.
+  int deferred_count = local_state_->GetInteger(prefs::kStabilityDeferredCount);
+  if (deferred_count) {
+    local_state_->SetInteger(prefs::kStabilityDeferredCount, 0);
+    UMA_STABILITY_HISTOGRAM_COUNTS_100(
+        "Stability.Internals.InitialStabilityLogDeferredCount", deferred_count);
+  }
+
+  int discard_count = local_state_->GetInteger(prefs::kStabilityDiscardCount);
+  if (discard_count) {
+    local_state_->SetInteger(prefs::kStabilityDiscardCount, 0);
+    UMA_STABILITY_HISTOGRAM_COUNTS_100("Stability.Internals.DataDiscardCount",
+                                       discard_count);
+  }
+
+  int version_mismatch_count =
+      local_state_->GetInteger(prefs::kStabilityVersionMismatchCount);
+  if (version_mismatch_count) {
+    local_state_->SetInteger(prefs::kStabilityVersionMismatchCount, 0);
+    UMA_STABILITY_HISTOGRAM_COUNTS_100(
+        "Stability.Internals.VersionMismatchCount", version_mismatch_count);
+  }
+}
+
+void StabilityMetricsProvider::RecordBreakpadRegistration(bool success) {
+  if (!success)
+    IncrementPrefValue(prefs::kStabilityBreakpadRegistrationFail);
+  else
+    IncrementPrefValue(prefs::kStabilityBreakpadRegistrationSuccess);
+}
+
+void StabilityMetricsProvider::RecordBreakpadHasDebugger(bool has_debugger) {
+  if (!has_debugger)
+    IncrementPrefValue(prefs::kStabilityDebuggerNotPresent);
+  else
+    IncrementPrefValue(prefs::kStabilityDebuggerPresent);
+}
+
+void StabilityMetricsProvider::CheckLastSessionEndCompleted() {
+  if (!local_state_->GetBoolean(prefs::kStabilitySessionEndCompleted)) {
+    IncrementPrefValue(prefs::kStabilityIncompleteSessionEndCount);
+    // This is marked false when we get a WM_ENDSESSION.
+    MarkSessionEndCompleted(true);
+  }
+}
+
+void StabilityMetricsProvider::MarkSessionEndCompleted(bool end_completed) {
+  local_state_->SetBoolean(prefs::kStabilitySessionEndCompleted, end_completed);
+}
+
+void StabilityMetricsProvider::LogCrash() {
+  IncrementPrefValue(prefs::kStabilityCrashCount);
+}
+
+void StabilityMetricsProvider::LogStabilityLogDeferred() {
+  IncrementPrefValue(prefs::kStabilityDeferredCount);
+}
+
+void StabilityMetricsProvider::LogStabilityDataDiscarded() {
+  IncrementPrefValue(prefs::kStabilityDiscardCount);
+}
+
+void StabilityMetricsProvider::LogLaunch() {
+  IncrementPrefValue(prefs::kStabilityLaunchCount);
+}
+
+void StabilityMetricsProvider::LogStabilityVersionMismatch() {
+  IncrementPrefValue(prefs::kStabilityVersionMismatchCount);
+}
+
+void StabilityMetricsProvider::IncrementPrefValue(const char* path) {
+  int value = local_state_->GetInteger(path);
+  local_state_->SetInteger(path, value + 1);
+}
+
+}  // namespace metrics