Move optional.h to webrtc/api/

webrtc/api/optional.cc

Index: webrtc/api/optional.cc
diff --git a/webrtc/rtc_base/optional.cc b/webrtc/api/optional.cc
similarity index 85%
rename from webrtc/rtc_base/optional.cc
rename to webrtc/api/optional.cc
index 4b41a2d7fb702406ca8a0e50b8f7f2b713c80bae..ec8696661f76276dbc28640e4c7d00a45e54ec26 100644
--- a/webrtc/rtc_base/optional.cc
+++ b/webrtc/api/optional.cc
@@ -8,14 +8,16 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/rtc_base/optional.h"
+#include "webrtc/api/optional.h"
 
 namespace rtc {
 namespace optional_internal {
 
 #if RTC_HAS_ASAN
 
-void* FunctionThatDoesNothingImpl(void* x) { return x; }
+void* FunctionThatDoesNothingImpl(void* x) {
+  return x;
+}
 
 #endif