Adds Mojo IDL.

third_party/WebKit/Source/bindings/core/v8/BUILD.gn

Index: third_party/WebKit/Source/bindings/core/v8/BUILD.gn
diff --git a/third_party/WebKit/Source/bindings/core/v8/BUILD.gn b/third_party/WebKit/Source/bindings/core/v8/BUILD.gn
index 7a0a9a30672eb1ffb4144ccf7887364075b17042..6a572f44451a3368f304662629cad92e2e8ecca0 100644
--- a/third_party/WebKit/Source/bindings/core/v8/BUILD.gn
+++ b/third_party/WebKit/Source/bindings/core/v8/BUILD.gn
@@ -123,6 +123,16 @@ generated_core_dictionary_files = [
   "$blink_core_output_dir/imagebitmap/ImageBitmapOptions.h",
   "$blink_core_output_dir/input/InputDeviceCapabilitiesInit.cpp",
   "$blink_core_output_dir/input/InputDeviceCapabilitiesInit.h",
+  "$blink_core_output_dir/mojo/MojoCreateMessagePipeResult.cpp",
+  "$blink_core_output_dir/mojo/MojoCreateMessagePipeResult.h",
+  "$blink_core_output_dir/mojo/MojoReadMessageOptions.cpp",
+  "$blink_core_output_dir/mojo/MojoReadMessageOptions.h",
+  "$blink_core_output_dir/mojo/MojoReadMessageResult.cpp",
+  "$blink_core_output_dir/mojo/MojoReadMessageResult.h",
+  "$blink_core_output_dir/mojo/MojoWatchOptions.cpp",
+  "$blink_core_output_dir/mojo/MojoWatchOptions.h",
+  "$blink_core_output_dir/mojo/MojoWriteMessageOptions.cpp",
+  "$blink_core_output_dir/mojo/MojoWriteMessageOptions.h",
   "$blink_core_output_dir/offscreencanvas/ImageEncodeOptions.cpp",
   "$blink_core_output_dir/offscreencanvas/ImageEncodeOptions.h",
   "$blink_core_output_dir/page/scrolling/ScrollStateInit.cpp",
@@ -215,6 +225,8 @@ generated_core_testing_callback_function_files = [
 ]
 
 generated_core_callback_function_files = [
+  "$bindings_core_v8_output_dir/MojoWatchCallback.cpp",
+  "$bindings_core_v8_output_dir/MojoWatchCallback.h",
   "$bindings_core_v8_output_dir/PerformanceObserverCallback.cpp",
   "$bindings_core_v8_output_dir/PerformanceObserverCallback.h",
 ]