WebString: makes string16 conversions explicit (part 1: blink, content)

content/renderer/render_frame_proxy.cc

Index: content/renderer/render_frame_proxy.cc
diff --git a/content/renderer/render_frame_proxy.cc b/content/renderer/render_frame_proxy.cc
index 9131d4c4fe2a66bd45f7f3adf371baa18424bd3a..c541ce69a63c51ad5ef836ad21d6d6d471174aa5 100644
--- a/content/renderer/render_frame_proxy.cc
+++ b/content/renderer/render_frame_proxy.cc
@@ -423,10 +423,10 @@ void RenderFrameProxy::forwardPostMessage(
 
   FrameMsg_PostMessage_Params params;
   params.is_data_raw_string = false;
-  params.data = event.data().toString();
-  params.source_origin = event.origin();
+  params.data = event.data().toString().utf16();
+  params.source_origin = event.origin().utf16();
   if (!target_origin.isNull())
-    params.target_origin = target_origin.toString();
+    params.target_origin = target_origin.toString().utf16();
 
   params.message_ports =
       WebMessagePortChannelImpl::ExtractMessagePortIDs(event.releaseChannels());