Integrate fallback crash handling in chrome

chrome/app/chrome_crash_reporter_client_win.cc

 // Copyright 2013 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.
 
 // TODO(ananta/scottmg)
 // Add test coverage for Crashpad.
 #include "chrome/app/chrome_crash_reporter_client_win.h"
 
 #include <assert.h>
 #include <windows.h>
@@ skipping 236 matching lines @@
 void ChromeCrashReporterClient::InitializeCrashReportingForProcess() {
   static ChromeCrashReporterClient* instance = nullptr;
   if (instance)
     return;
 
   instance = new ChromeCrashReporterClient();
   ANNOTATE_LEAKING_OBJECT_PTR(instance);
 
   std::wstring process_type = install_static::GetSwitchValueFromCommandLine(
       ::GetCommandLine(), install_static::kProcessType);
-  if (process_type != install_static::kCrashpadHandler) {
+  // Don't set up Crashpad crash reporting in the Crashpad handler itself, nor
+  // in the fallback crash handler for the Crashpad handler process.
+  if (process_type != install_static::kCrashpadHandler &&
+      process_type != install_static::kFallbackHandler) {
     crash_reporter::SetCrashReporterClient(instance);
     crash_reporter::InitializeCrashpadWithEmbeddedHandler(
         process_type.empty(), install_static::UTF16ToUTF8(process_type));
   }
 }
 #endif  // NACL_WIN64
 
 bool ChromeCrashReporterClient::GetAlternativeCrashDumpLocation(
     base::string16* crash_dir) {
   // By setting the BREAKPAD_DUMP_LOCATION environment variable, an alternate
@@ skipping 129 matching lines @@
 bool ChromeCrashReporterClient::GetCollectStatsInSample() {
   return install_static::GetCollectStatsInSample();
 }
 
 bool ChromeCrashReporterClient::EnableBreakpadForProcess(
     const std::string& process_type) {
   // This is not used by Crashpad (at least on Windows).
   NOTREACHED();
   return true;
 }