Revert "Make Crashpad start asynchronous, and move back to chrome_elf"

components/crash/content/app/crashpad.cc

Index: components/crash/content/app/crashpad.cc
diff --git a/components/crash/content/app/crashpad.cc b/components/crash/content/app/crashpad.cc
index a0eabba349246f0540a88cf0a5b260f1b3e65c04..76f67348ab0fcb6cd0e7ed3412a410d31be569da 100644
--- a/components/crash/content/app/crashpad.cc
+++ b/components/crash/content/app/crashpad.cc
@@ -335,13 +335,6 @@ void __declspec(dllexport)
     RequestSingleCrashUploadImpl(const std::string& local_id) {
   crash_reporter::RequestSingleCrashUpload(local_id);
 }
-
-// This helper is invoked by code in chrome.dll to wait for the handler start to
-// complete.
-void __declspec(dllexport) BlockUntilHandlerStartedImpl() {
-  crash_reporter::BlockUntilHandlerStarted();
-}
-
 }  // extern "C"
 
 #endif  // OS_WIN