Move optional.h to webrtc/api/

webrtc/api/optional.h

Index: webrtc/api/optional.h
diff --git a/webrtc/rtc_base/optional.h b/webrtc/api/optional.h
similarity index 97%
copy from webrtc/rtc_base/optional.h
copy to webrtc/api/optional.h
index ca3208e4d55bdcb9493f915d8800beb2d6eb6d5e..de1ec764bfbd881d1a805d73d92b54166818433c 100644
--- a/webrtc/rtc_base/optional.h
+++ b/webrtc/api/optional.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_RTC_BASE_OPTIONAL_H_
-#define WEBRTC_RTC_BASE_OPTIONAL_H_
+#ifndef WEBRTC_API_OPTIONAL_H_
+#define WEBRTC_API_OPTIONAL_H_
 
 #include <algorithm>
 #include <memory>
@@ -44,7 +44,9 @@ inline T* FunctionThatDoesNothing(T* x) {
 #else
 
 template <typename T>
-inline T* FunctionThatDoesNothing(T* x) { return x; }
+inline T* FunctionThatDoesNothing(T* x) {
+  return x;
+}
 
 #endif
 
@@ -96,9 +98,7 @@ template <typename T>
 class Optional final {
  public:
   // Construct an empty Optional.
-  Optional() : has_value_(false), empty_('\0') {
-    PoisonValue();
-  }
+  Optional() : has_value_(false), empty_('\0') { PoisonValue(); }
 
   // Construct an Optional that contains a value.
   explicit Optional(const T& value) : has_value_(true) {
@@ -293,9 +293,7 @@ class Optional final {
   }
 
   // Tell sanitizers that value_ is OK to touch again.
-  void UnpoisonValue() {
-    rtc::AsanUnpoison(rtc::MakeArrayView(&value_, 1));
-  }
+  void UnpoisonValue() { rtc::AsanUnpoison(rtc::MakeArrayView(&value_, 1)); }
 
   bool has_value_;  // True iff value_ contains a live value.
   union {
@@ -406,4 +404,4 @@ void PrintTo(const rtc::Optional<T>& opt, std::ostream* os) {
 
 }  // namespace rtc
 
-#endif  // WEBRTC_RTC_BASE_OPTIONAL_H_
+#endif  // WEBRTC_API_OPTIONAL_H_