[windows] Filter --flag-switches-begin and --flag-switches-end from being sent in the breakpad ...

chrome/app/breakpad_win.cc

 // Copyright (c) 2011 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/app/breakpad_win.h"
 
 #include <windows.h>
 #include <shellapi.h>
 #include <tchar.h>
 
@@ skipping 101 matching lines @@
          StartsWith(flag, L"--flash-broker=", true) ||
 
          // Just about everything has this, don't bother.
          StartsWith(flag, L"/prefetch:", true) ||
 
          // We handle the plugin path separately since it is usually too big
          // to fit in the switches (limited to 63 characters).
          StartsWith(flag, L"--plugin-path=", true) ||
 
          // This is too big so we end up truncating it anyway.
-         StartsWith(flag, L"--force-fieldtest=", true);
+         StartsWith(flag, L"--force-fieldtest=", true) ||
+
+         // These surround the flags that were added by about:flags, it lets
+         // you distinguish which flags were added manually via the command
+         // line versus those added through about:flags. For the most part
+         // we don't care how an option was enabled, so we strip these.
+         // (If you need to know can always look at the PEB).
+         flag == L"--flag-switches-begin" ||
+         flag == L"--flag-switches-end";
 }
 
 extern "C" void __declspec(dllexport) __cdecl SetCommandLine(
     const CommandLine* command_line) {
   if (!g_custom_entries)
     return;
 
   const CommandLine::StringVector& argv = command_line->argv();
 
   // Copy up to the kMaxSwitches arguments into the custom entries array. Skip
@@ skipping 589 matching lines @@
       if (QueueUserWorkItem(
               &InitCrashReporterThread,
               info,
               WT_EXECUTELONGFUNCTION) == 0) {
         // We failed to queue to the worker pool, initialize in this thread.
         InitCrashReporterThread(info);
       }
     }
   }
 }