Create MetricsPrivateDelegate for metricsPrivate behavior

chrome/browser/extensions/api/metrics_private/metrics_private_api.cc

 // Copyright (c) 2012 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/extensions/api/metrics_private/metrics_private_api.h"
 
 #include <limits.h>
 
 #include <algorithm>
 
+#include "base/lazy_instance.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
-#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
+#include "chrome/browser/extensions/api/chrome_extensions_api_client.h"
 #include "chrome/common/extensions/api/metrics_private.h"
 #include "components/variations/variations_associated_data.h"
+#include "content/public/browser/browser_context.h"
 #include "content/public/browser/user_metrics.h"
+#include "extensions/browser/api/metrics_private/metrics_private_delegate.h"
 #include "extensions/common/extension.h"
 
 namespace extensions {
 
-namespace GetIsCrashReportingEnabled =
-    api::metrics_private::GetIsCrashReportingEnabled;
 namespace GetVariationParams = api::metrics_private::GetVariationParams;
-namespace GetFieldTrial = api::metrics_private::GetFieldTrial;
 namespace RecordUserAction = api::metrics_private::RecordUserAction;
 namespace RecordValue = api::metrics_private::RecordValue;
 namespace RecordSparseValue = api::metrics_private::RecordSparseValue;
 namespace RecordPercentage = api::metrics_private::RecordPercentage;
 namespace RecordCount = api::metrics_private::RecordCount;
 namespace RecordSmallCount = api::metrics_private::RecordSmallCount;
 namespace RecordMediumCount = api::metrics_private::RecordMediumCount;
 namespace RecordTime = api::metrics_private::RecordTime;
 namespace RecordMediumTime = api::metrics_private::RecordMediumTime;
 namespace RecordLongTime = api::metrics_private::RecordLongTime;
 
 namespace {
 
 const size_t kMaxBuckets = 10000; // We don't ever want more than these many
                                   // buckets; there is no real need for them
                                   // and would cause crazy memory usage
 } // namespace
 
 ExtensionFunction::ResponseAction
 MetricsPrivateGetIsCrashReportingEnabledFunction::Run() {
+  MetricsPrivateAPI* api =
+      BrowserContextKeyedAPIFactory<MetricsPrivateAPI>::Get(browser_context());
+  DCHECK(api);
+
   return RespondNow(OneArgument(base::MakeUnique<base::FundamentalValue>(
-      ChromeMetricsServiceAccessor::IsMetricsAndCrashReportingEnabled())));
+      api->delegate()->IsCrashReportingEnabled())));
 }
 
 ExtensionFunction::ResponseAction MetricsPrivateGetFieldTrialFunction::Run() {
   std::string name;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &name));
 
   return RespondNow(OneArgument(base::MakeUnique<base::StringValue>(
       base::FieldTrialList::FindFullName(name))));
 }
 
@@ skipping 146 matching lines @@
 ExtensionFunction::ResponseAction MetricsPrivateRecordLongTimeFunction::Run() {
   std::unique_ptr<RecordLongTime::Params> params(
       RecordLongTime::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
   static const int kOneHourMs = 60 * 60 * 1000;
   RecordValue(params->metric_name, base::HISTOGRAM, 1, kOneHourMs, 50,
               params->value);
   return RespondNow(NoArguments());
 }
 
+MetricsPrivateAPI::MetricsPrivateAPI(content::BrowserContext* context) {
+  delegate_ = ExtensionsAPIClient::Get()->CreateMetricsPrivateDelegate();
+}
+
+MetricsPrivateAPI::~MetricsPrivateAPI() {}
+
+static base::LazyInstance<BrowserContextKeyedAPIFactory<MetricsPrivateAPI>>
+    g_factory = LAZY_INSTANCE_INITIALIZER;
+
+// static
+BrowserContextKeyedAPIFactory<MetricsPrivateAPI>*
+MetricsPrivateAPI::GetFactoryInstance() {
+  return g_factory.Pointer();
+}
+
 } // namespace extensions