Add the crash client ID to the uninstall URL params.

chrome/installer/util/google_chrome_distribution.cc

Index: chrome/installer/util/google_chrome_distribution.cc
diff --git a/chrome/installer/util/google_chrome_distribution.cc b/chrome/installer/util/google_chrome_distribution.cc
index 49490d42a2e5f5dba894d6dc8f586c88fe98f9e8..2b8d6bafc1b1a33aa68b1ab5f099bed7387e4406 100644
--- a/chrome/installer/util/google_chrome_distribution.cc
+++ b/chrome/installer/util/google_chrome_distribution.cc
@@ -20,6 +20,7 @@
 #include "base/win/scoped_comptr.h"
 #include "base/win/windows_version.h"
 #include "chrome/common/chrome_icon_resources_win.h"
+#include "chrome/common/chrome_paths_internal.h"
 #include "chrome/installer/util/app_registration_data.h"
 #include "chrome/installer/util/channel_info.h"
 #include "chrome/installer/util/google_update_constants.h"
@@ -32,6 +33,8 @@
 #include "chrome/installer/util/updating_app_registration_data.h"
 #include "chrome/installer/util/util_constants.h"
 #include "chrome/installer/util/wmi.h"
+#include "third_party/crashpad/crashpad/client/crash_report_database.h"
+#include "third_party/crashpad/crashpad/client/settings.h"
 
 namespace {
 
@@ -244,6 +247,16 @@ base::string16 GoogleChromeDistribution::GetDistributionData(HKEY root_key) {
   result.append(L"=");
   result.append(ap_value);
 
+  // Crash client id.
+  base::FilePath crash_dir;
+  if (chrome::GetDefaultCrashDumpLocation(&crash_dir)) {
+    crashpad::UUID client_id;
+    scoped_ptr<crashpad::CrashReportDatabase> database(
+        crashpad::CrashReportDatabase::InitializeWithoutCreating(crash_dir));
+    if (database && database->GetSettings()->GetClientID(&client_id))
+      result.append(L"&crash_client_id=").append(client_id.ToString16());
+  }
+
   return result;
 }