Revert the revert. This change was not the cause of the failures, so relanding.

Revert 110490 - Revert "[Sync] Add version info to about:sync"

This reverts r110456.

These tests have been failing on the Mac10.6 Sync builder since this was landed:
ManyClientBookmarksSyncTest.Sanity
ManyClientPasswordsSyncTest.Sanity
ManyClientPreferencesSyncTest.Sanity

BUG=
TEST=

Review URL: http://codereview.chromium.org/8590030

TBR=avi@chromium.org
Review URL: http://codereview.chromium.org/8585037

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110532 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/sync_internals/about.html

@@ -42,6 +42,10 @@ table#routingInfo tr:nth-child(odd) {
 
   <h2>Details</h2>
   <table id="aboutDetails">
+    <tr>
+      <td>Version</td>
+      <td jscontent="version"/>
+    </tr>
     <tr>
       <td>Authenticated</td>
       <td>

chrome/browser/sync/engine/all_status.cc

@@ -188,6 +188,11 @@ void AllStatus::SetCryptoHasPendingKeys(bool has_pending_keys) {
   status_.crypto_has_pending_keys = has_pending_keys;
 }
 
+void AllStatus::SetUniqueId(const std::string& guid) {
+  ScopedStatusLock lock(this);
+  status_.unique_id = guid;
+}
+
 ScopedStatusLock::ScopedStatusLock(AllStatus* allstatus)
     : allstatus_(allstatus) {
   allstatus->mutex_.Acquire();

chrome/browser/sync/engine/all_status.h

@@ -47,6 +47,8 @@ class AllStatus : public SyncEngineEventListener {
   void SetCryptographerReady(bool ready);
   void SetCryptoHasPendingKeys(bool has_pending_keys);
 
+  void SetUniqueId(const std::string& guid);
+
  protected:
   // Examines syncer to calculate syncing and the unsynced count,
   // and returns a Status with new values.

chrome/browser/sync/internal_api/sync_manager.cc

@@ -935,6 +935,7 @@ bool SyncManager::SyncInternal::SignIn(const SyncCredentials& credentials) {
       base::Base64Encode(state, &encoded_state);
       VLOG(1) << "Read notification state: " << encoded_state;
     }
+    allstatus_.SetUniqueId(unique_id);
   } else {
     LOG(ERROR) << "Could not read notification unique ID/state";
   }

chrome/browser/sync/internal_api/sync_manager.h

@@ -161,6 +161,9 @@ class SyncManager {
     syncable::ModelTypeSet encrypted_types;
     bool cryptographer_ready;
     bool crypto_has_pending_keys;
+
+    // The unique identifer for this client.
+    std::string unique_id;
   };
 
   // An interface the embedding application implements to be notified

chrome/browser/sync/sync_ui_util.cc

@@ -18,6 +18,7 @@
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/chrome_version_info.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
 #include "chrome/common/url_constants.h"
 #include "grit/browser_resources.h"
@@ -491,6 +492,7 @@ void ConstructAboutInformation(ProfileSyncService* service,
                        ProfileSyncService::BuildSyncStatusSummaryText(
                        full_status.summary));
 
+    strings->SetString("version", GetVersionString());
     strings->Set("authenticated",
                  new base::FundamentalValue(full_status.authenticated));
     strings->SetString("auth_problem",
@@ -505,6 +507,10 @@ void ConstructAboutInformation(ProfileSyncService* service,
                                     service->sync_initialized());
     sync_ui_util::AddBoolSyncDetail(details, "Sync Setup Has Completed",
                                     service->HasSyncSetupCompleted());
+    sync_ui_util::AddStringSyncDetails(
+        details,
+        "Client ID",
+        full_status.unique_id.empty() ? "none" : full_status.unique_id);
     sync_ui_util::AddBoolSyncDetail(details,
                                     "Server Up",
                                     full_status.server_up);
@@ -663,4 +669,28 @@ void ConstructAboutInformation(ProfileSyncService* service,
   }
 }
 
+std::string GetVersionString() {
+  // Build a version string that matches MakeUserAgentForSyncApi with the
+  // addition of channel info and proper OS names.
+  chrome::VersionInfo chrome_version;
+  if (!chrome_version.is_valid())
+    return "invalid";
+  // GetVersionStringModifier returns empty string for stable channel or
+  // unofficial builds, the channel string otherwise. We want to have "-devel"
+  // for unofficial builds only.
+  std::string version_modifier =
+      chrome::VersionInfo::GetVersionStringModifier();
+  if (version_modifier.empty()) {
+    if (chrome::VersionInfo::GetChannel() !=
+            chrome::VersionInfo::CHANNEL_STABLE) {
+      version_modifier = "-devel";
+    }
+  } else {
+    version_modifier = " " + version_modifier;
+  }
+  return chrome_version.Name() + " " + chrome_version.OSType() + " " +
+      chrome_version.Version() + " (" + chrome_version.LastChange() + ")" +
+      version_modifier;
+}
+
 }  // namespace sync_ui_util

chrome/browser/sync/sync_ui_util.h

@@ -83,5 +83,12 @@ void AddIntSyncDetail(base::ListValue* details,
 void AddStringSyncDetails(ListValue* details, const std::string& stat_name,
                           const std::string& stat_value);
 
+// Returns a string describing the chrome version environment. Version format:
+// <Build Info> <OS> <Version number> (<Last change>)<channel or "-devel">
+// If version information is unavailable, returns "invalid."
+// TODO(zea): this approximately matches MakeUserAgentForSyncApi in
+// sync_backend_host.cc. Unify the two if possible.
+std::string GetVersionString();
+
 }  // namespace sync_ui_util
 #endif  // CHROME_BROWSER_SYNC_SYNC_UI_UTIL_H_