sync: Add DeviceInfo protobuf and supporting code

chrome/browser/sync/glue/device_info.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/sync/glue/device_info.h"
+
+#include "base/threading/sequenced_worker_pool.h"
+#include "chrome/common/chrome_version_info.h"
+#include "content/public/browser/browser_thread.h"
+#include "sync/util/get_session_name.h"
+
+namespace browser_sync {
+
+DeviceInfo::DeviceInfo()
+    : client_name_("Unset"),
+      sync_user_agent_("Unknown"),

[Nicolas Zea, 2012/10/01 21:24:30]

any reason these are different? (unset vs unknown)

[rlarocque, 2012/10/01 22:24:12]

I seem to remember that this is the way it was before, but I'm having trouble
digging up the historical evidence to support that claim.  Maybe I'm just
imagining things.

We can make them uniform.  Do you prefer "Unset", "Unknown", an empty string, or
some other value?  Personally, I prefer "Unset".

[Nicolas Zea, 2012/10/05 20:28:51]

I'd prefer the same value. Either one works though.

[rlarocque, 2012/10/05 21:05:00]

Done.

+      device_type_(sync_pb::SyncEnums::TYPE_OTHER) {
+}
+
+DeviceInfo::DeviceInfo(const std::string& client_name,
+                       const std::string& chrome_version,
+                       const std::string& sync_user_agent,
+                       const sync_pb::SyncEnums::DeviceType device_type)
+    : client_name_(client_name),
+      chrome_version_(chrome_version),
+      sync_user_agent_(sync_user_agent),
+      device_type_(device_type) {
+}
+
+DeviceInfo::~DeviceInfo() { }
+
+const std::string& DeviceInfo::client_name() const {
+  return client_name_;
+}
+
+const std::string& DeviceInfo::chrome_version() const {
+  return chrome_version_;
+}
+
+const std::string& DeviceInfo::sync_user_agent() const {
+  return sync_user_agent_;
+}
+
+sync_pb::SyncEnums::DeviceType DeviceInfo::device_type() const {
+  return device_type_;
+}
+
+bool DeviceInfo::Equals(const DeviceInfo& other) const {
+  return this->client_name() == other.client_name()
+      && this->chrome_version() == other.chrome_version()
+      && this->sync_user_agent() == other.sync_user_agent()
+      && this->device_type() == other.device_type();
+}
+
+// static.
+sync_pb::SyncEnums::DeviceType DeviceInfo::GetLocalDeviceType() {
+#if defined(OS_CHROMEOS)
+  return sync_pb::SyncEnums_DeviceType_TYPE_CROS;
+#elif defined(OS_LINUX)
+  return sync_pb::SyncEnums_DeviceType_TYPE_LINUX;
+#elif defined(OS_MACOSX)
+  return sync_pb::SyncEnums_DeviceType_TYPE_MAC;
+#elif defined(OS_WIN)
+  return sync_pb::SyncEnums_DeviceType_TYPE_WIN;
+#elif defined(OS_ANDROID)
+  return IsTabletUI() ?
+      sync_pb::SessionHeader_DeviceType_TYPE_TABLET :
+      sync_pb::SessionHeader_DeviceType_TYPE_PHONE;
+#else
+  return sync_pb::SessionHeader_DeviceType_TYPE_OTHER;
+#endif
+}
+
+// static
+std::string DeviceInfo::MakeUserAgentForSyncApi(
+    const chrome::VersionInfo &version_info) {

[Nicolas Zea, 2012/10/01 21:24:30]

VersionInfo& version_info

[rlarocque, 2012/10/01 22:24:12]

Done.

+  std::string user_agent;
+  user_agent = "Chrome ";
+#if defined(OS_WIN)
+  user_agent += "WIN ";
+#elif defined(OS_CHROMEOS)
+  user_agent += "CROS ";
+#elif defined(OS_LINUX)
+  user_agent += "LINUX ";
+#elif defined(OS_FREEBSD)
+  user_agent += "FREEBSD ";
+#elif defined(OS_OPENBSD)
+  user_agent += "OPENBSD ";
+#elif defined(OS_MACOSX)
+  user_agent += "MAC ";

[Nicolas Zea, 2012/10/01 21:24:30]

you're missing android

[rlarocque, 2012/10/01 22:24:12]

!!!

I specifically looked for this when I updated the patch.  I guess I fail at
using git. It wasn't in my local repo, and I don't remember resolving any
conflicts involving this code, but it's definitely in trunk.

Fixed.

+#endif
+  if (!version_info.is_valid()) {
+    DLOG(ERROR) << "Unable to create chrome::VersionInfo object";
+    return user_agent;
+  }
+
+  user_agent += version_info.Version();
+  user_agent += " (" + version_info.LastChange() + ")";
+  if (!version_info.IsOfficialBuild())
+    user_agent += "-devel";
+  return user_agent;
+}
+
+// static.
+void DeviceInfo::CreateLocalDeviceInfo(
+    base::Callback<void(const DeviceInfo& local_info)> callback) {
+  syncer::GetSessionName(
+      content::BrowserThread::GetBlockingPool(),
+      base::Bind(&DeviceInfo::CreateLocalDeviceInfoContinuation, callback));
+}
+
+// static.
+void DeviceInfo::CreateLocalDeviceInfoContinuation(
+    base::Callback<void(const DeviceInfo& local_info)> callback,
+    const std::string& session_name) {
+  chrome::VersionInfo version_info;
+
+  DeviceInfo local_info(
+      session_name,
+      version_info.CreateVersionString(),
+      MakeUserAgentForSyncApi(version_info),
+      GetLocalDeviceType());
+
+  callback.Run(local_info);
+}
+
+}  // namespace browser_sync