Revert of Switch chrome_elf exception handling from breakpad to crashpad.

components/crash/content/app/crashpad.cc

 // Copyright 2015 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 "components/crash/content/app/crashpad.h"
 
 #include <stddef.h>
 #include <string.h>
 
 #if BUILDFLAG(ENABLE_KASKO)
@@ skipping 210 matching lines @@
   // time to chew on symbols.
   if (!browser_process || is_debug_build) {
     crashpad_info->set_system_crash_reporter_forwarding(
         crashpad::TriState::kDisabled);
   }
 #endif  // OS_MACOSX
 
   g_simple_string_dictionary = new crashpad::SimpleStringDictionary();
   crashpad_info->set_simple_annotations(g_simple_string_dictionary);
 
-  // On Windows chrome_elf registers crash keys. This should work identically
-  // for component and non component builds.
+#if !defined(OS_WIN) || !defined(COMPONENT_BUILD)
+  // chrome/common/child_process_logging_win.cc registers crash keys for
+  // chrome.dll. In a component build, that is sufficient as chrome.dll and
+  // chrome.exe share a copy of base (in base.dll). In a static build, the EXE
+  // must separately initialize the crash keys configuration as it has its own
+  // statically linked copy of base.
   base::debug::SetCrashKeyReportingFunctions(SetCrashKeyValue, ClearCrashKey);
   crash_reporter_client->RegisterCrashKeys();
+#endif
 
   SetCrashKeyValue("ptype", browser_process ? base::StringPiece("browser")
                                             : base::StringPiece(process_type));
 #if defined(OS_POSIX)
   SetCrashKeyValue("pid", base::IntToString(getpid()));
 #elif defined(OS_WIN)
   SetCrashKeyValue("pid", base::IntToString(::GetCurrentProcessId()));
 #endif
 
   logging::SetLogMessageHandler(LogMessageHandler);
@@ skipping 225 matching lines @@
                                    base::UTF16ToUTF8(value));
 }
 
 void __declspec(dllexport) __cdecl ClearCrashKeyValueImpl(const wchar_t* key) {
   crash_reporter::ClearCrashKey(base::UTF16ToUTF8(key));
 }
 
 }  // extern "C"
 
 #endif  // OS_WIN