[Sync] Disable unrecoverable error uploading.

chrome/browser/sync/glue/chrome_report_unrecoverable_error.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/chrome_report_unrecoverable_error.h"
 
 #include "base/rand_util.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
 #include "chrome/common/chrome_constants.h"
 
 namespace browser_sync {
 
-static const double kErrorUploadRatio = 0.15;
+static const double kErrorUploadRatio = 0.0;
 void ChromeReportUnrecoverableError() {
   // TODO(lipalani): Add this for other platforms as well.
 #if defined(OS_WIN)
   // We only want to upload |kErrorUploadRatio| ratio of errors.
   if (kErrorUploadRatio <= 0.0)
     return; // We are not allowed to upload errors.
   double random_number = base::RandDouble();
   if (random_number > kErrorUploadRatio)
     return;
 
   // Get the breakpad pointer from chrome.exe
   typedef void (__cdecl *DumpProcessFunction)();
   DumpProcessFunction DumpProcess = reinterpret_cast<DumpProcessFunction>(
       ::GetProcAddress(::GetModuleHandle(
                        chrome::kBrowserProcessExecutableName),
                        "DumpProcessWithoutCrash"));
   if (DumpProcess)
     DumpProcess();
 #endif  // OS_WIN
 
 }
 
 }  // namespace browser_sync