Adds Mojo IDL.

third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt

Index: third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
diff --git a/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt b/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
index f8a972309b1008a88819b0b78a8344e42cf2624a..30782bfda7f38e9997ae5d689780ad9d647ecb2c 100644
--- a/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
+++ b/third_party/WebKit/LayoutTests/webexposed/global-interface-listing-expected.txt
@@ -4090,6 +4090,39 @@ interface MimeTypeArray
     method constructor
     method item
     method namedItem
+interface Mojo
+    static method createMessagePipe
+    attribute @@toStringTag
+    attribute RESULT_ABORTED
+    attribute RESULT_ALREADY_EXISTS
+    attribute RESULT_BUSY
+    attribute RESULT_CANCELLED
+    attribute RESULT_DATA_LOSS
+    attribute RESULT_DEADLINE_EXCEEDED
+    attribute RESULT_FAILED_PRECONDITION
+    attribute RESULT_INTERNAL
+    attribute RESULT_INVALID_ARGUMENT
+    attribute RESULT_NOT_FOUND
+    attribute RESULT_OK
+    attribute RESULT_OUT_OF_RANGE
+    attribute RESULT_PERMISSION_DENIED
+    attribute RESULT_RESOURCE_EXHAUSTED
+    attribute RESULT_SHOULD_WAIT
+    attribute RESULT_UNAVAILABLE
+    attribute RESULT_UNIMPLEMENTED
+    attribute RESULT_UNKNOWN
+    method constructor
+interface MojoHandle
+    attribute @@toStringTag
+    method close
+    method constructor
+    method readMessage
+    method watch
+    method writeMessage
+interface MojoWatcher
+    attribute @@toStringTag
+    method cancel
+    method constructor
 interface MouseEvent : UIEvent
     attribute @@toStringTag
     getter altKey