rename coro Error.h to Result.h

Summary: [folly] Rename coro `Error.h` to `Result.h` since it has multiple result types.

Reviewed By: Mizuchi

Differential Revision: D25625178

fbshipit-source-id: 45f8194922b764429969329563a4695b1c13da6f

folly/experimental/coro/AsyncGenerator.h

@@ -21,8 +21,8 @@
 #include <folly/Traits.h>
 #include <folly/Try.h>
 #include <folly/experimental/coro/CurrentExecutor.h>
-#include <folly/experimental/coro/Error.h>
 #include <folly/experimental/coro/Invoke.h>
+#include <folly/experimental/coro/Result.h>
 #include <folly/experimental/coro/Utils.h>
 #include <folly/experimental/coro/ViaIfAsync.h>
 #include <folly/experimental/coro/WithAsyncStack.h>

folly/experimental/coro/GmockHelpers.h

@@ -19,7 +19,7 @@
 #include <atomic>
 #include <type_traits>
 
-#include <folly/experimental/coro/Error.h>
+#include <folly/experimental/coro/Result.h>
 #include <folly/experimental/coro/Task.h>
 #include <folly/portability/GMock.h>
 

folly/experimental/coro/Retry.h

@@ -20,7 +20,7 @@
 #include <folly/ExceptionWrapper.h>
 #include <folly/Random.h>
 #include <folly/Try.h>
-#include <folly/experimental/coro/Error.h>
+#include <folly/experimental/coro/Result.h>
 #include <folly/experimental/coro/Sleep.h>
 #include <folly/experimental/coro/Task.h>
 #include <folly/experimental/coro/Traits.h>

folly/experimental/coro/Task.h

@@ -29,8 +29,8 @@
 #include <folly/Traits.h>
 #include <folly/Try.h>
 #include <folly/experimental/coro/CurrentExecutor.h>
-#include <folly/experimental/coro/Error.h>
 #include <folly/experimental/coro/Invoke.h>
+#include <folly/experimental/coro/Result.h>
 #include <folly/experimental/coro/Traits.h>
 #include <folly/experimental/coro/Utils.h>
 #include <folly/experimental/coro/ViaIfAsync.h>

folly/experimental/coro/test/ErrorTest.cpp

@@ -18,7 +18,7 @@
 
 #if FOLLY_HAS_COROUTINES
 
-#include <folly/experimental/coro/Error.h>
+#include <folly/experimental/coro/Result.h>
 
 #include <type_traits>