Revert of Don't IAT patch SetUnhandledExceptionFilter when ASan is active

chrome_elf/chrome_elf_main.cc

Index: chrome_elf/chrome_elf_main.cc
diff --git a/chrome_elf/chrome_elf_main.cc b/chrome_elf/chrome_elf_main.cc
index 718bd8da8457b3cfb8f7ffa1ec7973aad0245bae..46e6e15b794bb8e1cf76ef0eac76907df32e9ad2 100644
--- a/chrome_elf/chrome_elf_main.cc
+++ b/chrome_elf/chrome_elf_main.cc
@@ -50,7 +50,6 @@
   ChromeCrashReporterClient::InitializeCrashReportingForProcess();
 }
 
-#if !defined(ADDRESS_SANITIZER)
 // chrome_elf loads early in the process and initializes Crashpad. That in turn
 // uses the SetUnhandledExceptionFilter API to set a top level exception
 // handler for the process. When the process eventually initializes, CRT sets
@@ -81,7 +80,6 @@
       SetUnhandledExceptionFilterPatch);
   CHECK(patched == 0);
 }
-#endif // !defined(ADDRESS_SANITIZER)
 
 }  // namespace
 
@@ -114,11 +112,8 @@
     InitializeCrashReportingForProcess();
     // CRT on initialization installs an exception filter which calls
     // TerminateProcess. We need to hook CRT's attempt to set an exception
-    // handler and ignore it. Don't do this when ASan is present, or ASan will
-    // fail to install its own unhandled exception filter.
-#if !defined(ADDRESS_SANITIZER)
+    // handler and ignore it.
     DisableSetUnhandledExceptionFilter();
-#endif
 
     install_static::InitializeProcessType();
     if (install_static::g_process_type ==