Delete root header file typedef.h.

Usage replaced with stdint.h, rtc_base/system/arch.h and
rtc_base/system/unused.h, as appropriate.

Bug: webrtc:6854
Change-Id: I97225465d14b969903d92979e2df3c3c05d35f18
Reviewed-on: https://webrtc-review.googlesource.com/90249
Reviewed-by: Niklas Enbom <niklas.enbom@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24100}

modules/utility/BUILD.gn

@@ -27,11 +27,11 @@ rtc_static_library("utility") {
   deps = [
     "..:module_api",
     "../..:webrtc_common",
-    "../../:typedefs",
     "../../common_audio",
     "../../rtc_base:checks",
     "../../rtc_base:rtc_base_approved",
     "../../rtc_base:rtc_task_queue",
+    "../../rtc_base/system:arch",
     "../../system_wrappers",
   ]
 }

modules/utility/include/helpers_android.h

@@ -14,6 +14,8 @@
 #include <jni.h>
 #include <string>
 
+#include "rtc_base/system/arch.h"
+
 // Abort the process if |jni| has a Java exception pending.
 // TODO(henrika): merge with CHECK_JNI_EXCEPTION() in jni_helpers.h.
 #define CHECK_EXCEPTION(jni)        \

modules/utility/include/process_thread.h

@@ -13,8 +13,6 @@
 
 #include <memory>
 
-#include "typedefs.h"  // NOLINT(build/include)
-
 #if defined(WEBRTC_WIN)
 // Due to a bug in the std::unique_ptr implementation that ships with MSVS,
 // we need the full definition of QueuedTask, on Windows.

modules/utility/source/process_thread_impl.h

@@ -21,7 +21,6 @@
 #include "rtc_base/platform_thread.h"
 #include "rtc_base/thread_checker.h"
 #include "system_wrappers/include/event_wrapper.h"
-#include "typedefs.h"  // NOLINT(build/include)
 
 namespace webrtc {