Factor Chrome details out of update manifest fetching.

chrome/browser/extensions/updater/chrome_manifest_fetch_data_delegate.cc

+// Copyright 2014 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 "base/strings/string_number_conversions.h"
+#include "chrome/browser/extensions/updater/chrome_manifest_fetch_data_delegate.h"
+#include "chrome/browser/google/google_brand.h"
+#include "chrome/browser/metrics/chrome_metrics_service_accessor.h"
+#include "components/omaha_query_params/omaha_query_params.h"
+
+using extensions::ManifestFetchData;
+
+ChromeManifestFetchDataDelegate::ChromeManifestFetchDataDelegate() {
+}
+
+ChromeManifestFetchDataDelegate::~ChromeManifestFetchDataDelegate() {
+}
+
+std::string ChromeManifestFetchDataDelegate::GetBaseQueryParams() {
+  return omaha_query_params::OmahaQueryParams::Get(
+      omaha_query_params::OmahaQueryParams::CRX);
+}
+
+bool ChromeManifestFetchDataDelegate::ShouldAlwaysCheckWebstore() {
+  return ChromeMetricsServiceAccessor::IsMetricsReportingEnabled();
+}
+
+std::string ChromeManifestFetchDataDelegate::GetBrandCode() {
+#if defined(GOOGLE_CHROME_BUILD)
+  std::string brand;
+  google_brand::GetBrand(&brand);
+  if (!brand.empty() && !google_brand::IsOrganic(brand))
+    return brand;
+#endif
+  return "";
+}
+
+// Provide ping data with the parameter ping=PING_DATA where PING_DATA
+// looks like r=DAYS or a=DAYS for extensions in the Chrome extensions gallery.
+// ('r' refers to 'roll call' ie installation, and 'a' refers to 'active').
+// These values will each be present at most once every 24 hours, and indicate
+// the number of days since the last time it was present in an update check.
+std::string ChromeManifestFetchDataDelegate::GetPingParamsAndData(
+    const std::string& extension_id,
+    const ManifestFetchData::PingData& old_ping_data,
+    ManifestFetchData::PingData* new_ping_data) {
+  std::string ping_value;
+  if (old_ping_data.rollcall_days == ManifestFetchData::kNeverPinged ||
+      old_ping_data.rollcall_days > 0) {
+    ping_value += "r=" + base::IntToString(old_ping_data.rollcall_days);
+    if (ChromeMetricsServiceAccessor::IsMetricsReportingEnabled()) {
+      ping_value += "&e=" + std::string(old_ping_data.is_enabled ? "1" : "0");
+    }
+    new_ping_data->rollcall_days = old_ping_data.rollcall_days;
+    new_ping_data->is_enabled = old_ping_data.is_enabled;
+  }
+  if (old_ping_data.active_days == ManifestFetchData::kNeverPinged ||
+      old_ping_data.active_days > 0) {
+    if (!ping_value.empty())
+      ping_value += "&";
+    ping_value += "a=" + base::IntToString(old_ping_data.active_days);
+    new_ping_data->active_days = old_ping_data.active_days;
+  }
+  return ping_value;
+}