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}
diff --git a/common_audio/signal_processing/complex_fft.c b/common_audio/signal_processing/complex_fft.c
index e2ac206..ddc9a97 100644
--- a/common_audio/signal_processing/complex_fft.c
+++ b/common_audio/signal_processing/complex_fft.c
@@ -17,6 +17,7 @@
 
 #include "common_audio/signal_processing/complex_fft_tables.h"
 #include "common_audio/signal_processing/include/signal_processing_library.h"
+#include "rtc_base/system/arch.h"
 
 #define CFFTSFT 14
 #define CFFTRND 1
diff --git a/common_audio/signal_processing/complex_fft_tables.h b/common_audio/signal_processing/complex_fft_tables.h
index 5171040..90fac07 100644
--- a/common_audio/signal_processing/complex_fft_tables.h
+++ b/common_audio/signal_processing/complex_fft_tables.h
@@ -11,7 +11,7 @@
 #ifndef COMMON_AUDIO_SIGNAL_PROCESSING_COMPLEX_FFT_TABLES_H_
 #define COMMON_AUDIO_SIGNAL_PROCESSING_COMPLEX_FFT_TABLES_H_
 
-#include "typedefs.h"  // NOLINT(build/include)
+#include <stdint.h>
 
 static const int16_t kSinTable1024[] = {
     0,      201,    402,    603,    804,    1005,   1206,   1406,   1607,
diff --git a/common_audio/signal_processing/cross_correlation_neon.c b/common_audio/signal_processing/cross_correlation_neon.c
index fdd03f1..f2afbdf 100644
--- a/common_audio/signal_processing/cross_correlation_neon.c
+++ b/common_audio/signal_processing/cross_correlation_neon.c
@@ -9,6 +9,7 @@
  */
 
 #include "common_audio/signal_processing/include/signal_processing_library.h"
+#include "rtc_base/system/arch.h"
 
 #include <arm_neon.h>
 
diff --git a/common_audio/signal_processing/dot_product_with_scale.h b/common_audio/signal_processing/dot_product_with_scale.h
index ff3c525..bb892d4 100644
--- a/common_audio/signal_processing/dot_product_with_scale.h
+++ b/common_audio/signal_processing/dot_product_with_scale.h
@@ -11,10 +11,9 @@
 #ifndef COMMON_AUDIO_SIGNAL_PROCESSING_DOT_PRODUCT_WITH_SCALE_H_
 #define COMMON_AUDIO_SIGNAL_PROCESSING_DOT_PRODUCT_WITH_SCALE_H_
 
+#include <stdint.h>
 #include <string.h>
 
-#include "typedefs.h"  // NOLINT(build/include)
-
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/common_audio/signal_processing/include/real_fft.h b/common_audio/signal_processing/include/real_fft.h
index 8da243d..8445066 100644
--- a/common_audio/signal_processing/include/real_fft.h
+++ b/common_audio/signal_processing/include/real_fft.h
@@ -11,7 +11,7 @@
 #ifndef COMMON_AUDIO_SIGNAL_PROCESSING_INCLUDE_REAL_FFT_H_
 #define COMMON_AUDIO_SIGNAL_PROCESSING_INCLUDE_REAL_FFT_H_
 
-#include "typedefs.h"  // NOLINT(build/include)
+#include <stdint.h>
 
 // For ComplexFFT(), the maximum fft order is 10;
 // WebRTC APM uses orders of only 7 and 8.
diff --git a/common_audio/signal_processing/include/signal_processing_library.h b/common_audio/signal_processing/include/signal_processing_library.h
index 4d6edbf..72aabe3 100644
--- a/common_audio/signal_processing/include/signal_processing_library.h
+++ b/common_audio/signal_processing/include/signal_processing_library.h
@@ -19,7 +19,6 @@
 
 #include <string.h>
 #include "common_audio/signal_processing/dot_product_with_scale.h"
-#include "typedefs.h"  // NOLINT(build/include)
 
 // Macros specific for the fixed point implementation
 #define WEBRTC_SPL_WORD16_MAX 32767
diff --git a/common_audio/signal_processing/real_fft_unittest.cc b/common_audio/signal_processing/real_fft_unittest.cc
index 2d6b7d1..3b43123 100644
--- a/common_audio/signal_processing/real_fft_unittest.cc
+++ b/common_audio/signal_processing/real_fft_unittest.cc
@@ -11,7 +11,6 @@
 #include "common_audio/signal_processing/include/real_fft.h"
 #include "common_audio/signal_processing/include/signal_processing_library.h"
 #include "test/gtest.h"
-#include "typedefs.h"  // NOLINT(build/include)
 
 namespace webrtc {
 namespace {
diff --git a/common_audio/signal_processing/resample_by_2_internal.h b/common_audio/signal_processing/resample_by_2_internal.h
index 5483e2e..145395a 100644
--- a/common_audio/signal_processing/resample_by_2_internal.h
+++ b/common_audio/signal_processing/resample_by_2_internal.h
@@ -16,7 +16,7 @@
 #ifndef COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_
 #define COMMON_AUDIO_SIGNAL_PROCESSING_RESAMPLE_BY_2_INTERNAL_H_
 
-#include "typedefs.h"  // NOLINT(build/include)
+#include <stdint.h>
 
 /*******************************************************************
  * resample_by_2_fast.c