[android-webview] Skip signal handler registration on x86/64

android_webview/common/aw_crash_handler.cc

Index: android_webview/common/aw_crash_handler.cc
diff --git a/android_webview/common/aw_crash_handler.cc b/android_webview/common/aw_crash_handler.cc
index 7dcdc9d5533fa816ed21694f40d7cc08f380960f..bbdc61b24689733d533dd7b14a570ee50518c0d6 100644
--- a/android_webview/common/aw_crash_handler.cc
+++ b/android_webview/common/aw_crash_handler.cc
@@ -11,6 +11,7 @@
 #include <unistd.h>
 
 #include "base/logging.h"
+#include "build/build_config.h"
 
 namespace {
 
@@ -66,6 +67,13 @@ namespace android_webview {
 namespace crash_handler {
 
 void RegisterCrashHandler(const std::string& version) {
+#if defined(ARCH_CPU_X86_FAMILY)
+  // Don't install signal handler on X86/64 because this breaks binary
+  // translators that handle SIGSEGV in userspace and get chained after our
+  // handler. See crbug.com/477444
+  return;
+#endif
+
   if (crash_handler_registered) {
     NOTREACHED();
     return;