Generate GUIDs for users who wish to upload crash reports. Include it in cra...

chrome/browser/google_update_settings_linux.cc

 // Copyright (c) 2009 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/installer/util/google_update_settings.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/path_service.h"
+#include "base/rand_util.h"
+#include "base/string_util.h"
 #include "chrome/common/chrome_paths.h"
 
+namespace google_update {
+std::string linux_guid;
+}
+
 // File name used in the user data dir to indicate consent.
 static const char kConsentToSendStats[] = "Consent To Send Stats";
+static const int kGuidLen = sizeof(uint64) * 4;  // 128 bits -> 32 bytes hex.
 
 // static
 bool GoogleUpdateSettings::GetCollectStatsConsent() {
   FilePath consent_file;
   PathService::Get(chrome::DIR_USER_DATA, &consent_file);
   consent_file = consent_file.Append(kConsentToSendStats);
-  return file_util::PathExists(consent_file);
+  bool r = file_util::ReadFileToString(consent_file,
+                                       &google_update::linux_guid);
+  google_update::linux_guid.resize(kGuidLen, '0');
+  return r;
 }
 
 // static
 bool GoogleUpdateSettings::SetCollectStatsConsent(bool consented) {
   FilePath consent_dir;
   PathService::Get(chrome::DIR_USER_DATA, &consent_dir);
   if (!file_util::DirectoryExists(consent_dir))
     return false;
 
   FilePath consent_file = consent_dir.AppendASCII(kConsentToSendStats);
-  if (consented)
-    return file_util::WriteFile(consent_file, "", 0) == 0;
-  else
+  if (consented) {
+    uint64 random;
+    google_update::linux_guid.clear();
+    for (int i = 0; i < 2; i++) {
+      random = base::RandUint64();
+      google_update::linux_guid += HexEncode(&random, sizeof(uint64));
+    }
+    const char* c_str = google_update::linux_guid.c_str();
+    return file_util::WriteFile(consent_file, c_str, kGuidLen) == kGuidLen;
+  }
+  else {
+    google_update::linux_guid .clear();
+    google_update::linux_guid.resize(kGuidLen, '0');
     return file_util::Delete(consent_file, false);
+  }
 }
 
 // static
 bool GoogleUpdateSettings::GetLanguage(std::wstring* language) {
   NOTIMPLEMENTED();
   return false;
 }