Implements JS bindings for mojo data pipe.

third_party/WebKit/Source/core/mojo/MojoHandle.idl

Index: third_party/WebKit/Source/core/mojo/MojoHandle.idl
diff --git a/third_party/WebKit/Source/core/mojo/MojoHandle.idl b/third_party/WebKit/Source/core/mojo/MojoHandle.idl
index 78a49ed0fd4be0c51ac155307da18422f4845550..50f5466f48238d2067ed02cc1605ec1edb7c24bf 100644
--- a/third_party/WebKit/Source/core/mojo/MojoHandle.idl
+++ b/third_party/WebKit/Source/core/mojo/MojoHandle.idl
@@ -10,12 +10,19 @@ callback MojoWatchCallback = void (MojoResult result);
     void close();
     [CallWith=ScriptState] MojoWatcher watch(MojoHandleSignals signals, MojoWatchCallback callback);
 
-    // TODO(alokp): Create MessagePipeHandle, a subclass of MojoHandle
+    // TODO(alokp): Create MojoMessagePipeHandle, a subclass of MojoHandle
     // and move the following member functions.
     MojoResult writeMessage(BufferSource buffer, sequence<MojoHandle> handles);
     MojoReadMessageResult readMessage(optional MojoReadMessageFlags flags);
 
-    // TODO(alokp): Create SharedBufferHandle, a subclass of MojoHandle
+    // TODO(alokp): Create MojoDataPipeProducerHandle and MojoDataPipeConsumerHandle,
+    // subclasses of MojoHandle and move the following member functions.
+    MojoWriteDataResult writeData(BufferSource buffer, optional MojoWriteDataOptions options);
+    MojoReadDataResult queryData();
+    MojoReadDataResult discardData(unsigned long numBytes, optional MojoDiscardDataOptions options);
+    MojoReadDataResult readData(BufferSource buffer, optional MojoReadDataOptions options);
+
+    // TODO(alokp): Create MojoSharedBufferHandle, a subclass of MojoHandle
     // and move the following member functions.
     MojoMapBufferResult mapBuffer(unsigned long offset, unsigned long numBytes);
     MojoCreateSharedBufferResult duplicateBufferHandle(optional MojoDuplicateBufferHandleOptions options);