Implements JS bindings for mojo shared buffer.

third_party/WebKit/Source/core/mojo/Mojo.cpp

Index: third_party/WebKit/Source/core/mojo/Mojo.cpp
diff --git a/third_party/WebKit/Source/core/mojo/Mojo.cpp b/third_party/WebKit/Source/core/mojo/Mojo.cpp
index 8cddb115bec3e534445f178ef9bafefa5c1b989b..f06dc11939b90f6c1bec17ae4f74b19623573478 100644
--- a/third_party/WebKit/Source/core/mojo/Mojo.cpp
+++ b/third_party/WebKit/Source/core/mojo/Mojo.cpp
@@ -5,6 +5,7 @@
 #include "core/mojo/Mojo.h"
 
 #include "core/mojo/MojoCreateMessagePipeResult.h"
+#include "core/mojo/MojoCreateSharedBufferResult.h"
 #include "core/mojo/MojoHandle.h"
 
 namespace blink {
@@ -27,4 +28,18 @@ void Mojo::createMessagePipe(MojoCreateMessagePipeResult& resultDict) {
   }
 }
 
+// static
+void Mojo::createSharedBuffer(unsigned numBytes,
+                              MojoCreateSharedBufferResult& resultDict) {
+  MojoCreateSharedBufferOptions* options = nullptr;
+  mojo::Handle handle;
+  MojoResult result =
+      MojoCreateSharedBuffer(options, numBytes, handle.mutable_value());
+
+  resultDict.setResult(result);
+  if (result == MOJO_RESULT_OK) {
+    resultDict.setHandle(MojoHandle::create(mojo::MakeScopedHandle(handle)));
+  }
+}
+
 }  // namespace blink