Update audio_processing module

Corresponds to upstream commit 524e9b043e7e86fd72353b987c9d5f6a1ebf83e1

Update notes:

 * Pull in third party license file

 * Replace .gypi files with BUILD.gn to keep track of what changes
   upstream

 * Bunch of new filse pulled in as dependencies

 * Won't build yet due to changes needed on top of these

webrtc/system_wrappers/source/trace_win.cc

@@ -0,0 +1,97 @@
+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/system_wrappers/source/trace_win.h"
+
+#include <assert.h>
+#include <stdarg.h>
+
+#include "Mmsystem.h"
+
+namespace webrtc {
+TraceWindows::TraceWindows()
+    : prev_api_tick_count_(0),
+      prev_tick_count_(0) {
+}
+
+TraceWindows::~TraceWindows() {
+}
+
+int32_t TraceWindows::AddTime(char* trace_message,
+                              const TraceLevel level) const {
+  uint32_t dw_current_time = timeGetTime();
+  SYSTEMTIME system_time;
+  GetSystemTime(&system_time);
+
+  if (level == kTraceApiCall) {
+    uint32_t dw_delta_time = dw_current_time - prev_tick_count_;
+    prev_tick_count_ = dw_current_time;
+
+    if (prev_tick_count_ == 0) {
+      dw_delta_time = 0;
+    }
+    if (dw_delta_time > 0x0fffffff) {
+      // Either wrap-around or data race.
+      dw_delta_time = 0;
+    }
+    if (dw_delta_time > 99999) {
+      dw_delta_time = 99999;
+    }
+
+    sprintf(trace_message, "(%2u:%2u:%2u:%3u |%5u) ", system_time.wHour,
+            system_time.wMinute, system_time.wSecond,
+            system_time.wMilliseconds, dw_delta_time);
+  } else {
+    uint32_t dw_delta_time = dw_current_time - prev_api_tick_count_;
+    prev_api_tick_count_ = dw_current_time;
+
+    if (prev_api_tick_count_ == 0) {
+      dw_delta_time = 0;
+    }
+    if (dw_delta_time > 0x0fffffff) {
+      // Either wraparound or data race.
+      dw_delta_time = 0;
+    }
+    if (dw_delta_time > 99999) {
+      dw_delta_time = 99999;
+    }
+    sprintf(trace_message, "(%2u:%2u:%2u:%3u |%5u) ", system_time.wHour,
+            system_time.wMinute, system_time.wSecond,
+            system_time.wMilliseconds, dw_delta_time);
+  }
+  return 22;
+}
+
+int32_t TraceWindows::AddDateTimeInfo(char* trace_message) const {
+  prev_api_tick_count_ = timeGetTime();
+  prev_tick_count_ = prev_api_tick_count_;
+
+  SYSTEMTIME sys_time;
+  GetLocalTime(&sys_time);
+
+  TCHAR sz_date_str[20];
+  TCHAR sz_time_str[20];
+
+  // Create date string (e.g. Apr 04 2002)
+  GetDateFormat(LOCALE_SYSTEM_DEFAULT, 0, &sys_time, TEXT("MMM dd yyyy"),
+                sz_date_str, 20);
+
+  // Create time string (e.g. 15:32:08)
+  GetTimeFormat(LOCALE_SYSTEM_DEFAULT, 0, &sys_time, TEXT("HH':'mm':'ss"),
+                sz_time_str, 20);
+
+  sprintf(trace_message, "Local Date: %ls Local Time: %ls", sz_date_str,
+          sz_time_str);
+
+  // Include NULL termination (hence + 1).
+  return static_cast<int32_t>(strlen(trace_message) + 1);
+}
+
+}  // namespace webrtc