Fuchsia: Emit JS console log metadata with logging lines.

There is a bug which causes the JS logging code to emit logging lines
without file and line information.

This fix outputs the full formatted line to stdout instead.

Change-Id: Icbb10da6d5d1d1db6b749495dd358c1b87c2ae5c
Reviewed-on: https://chromium-review.googlesource.com/c/1357653Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612892}

webrunner/browser/frame_impl.cc

@@ -442,19 +442,19 @@ bool FrameImpl::DidAddMessageToConsole(content::WebContents* source,
   switch (level) {
     case static_cast<std::underlying_type<chromium::web::LogLevel>::type>(
         chromium::web::LogLevel::DEBUG):
-      LOG(INFO) << "debug:" << message;
+      LOG(INFO) << "debug:" << message_formatted;
       break;
     case static_cast<std::underlying_type<chromium::web::LogLevel>::type>(
         chromium::web::LogLevel::INFO):
-      LOG(INFO) << "info:" << message;
+      LOG(INFO) << "info:" << message_formatted;
       break;
     case static_cast<std::underlying_type<chromium::web::LogLevel>::type>(
         chromium::web::LogLevel::WARN):
-      LOG(WARNING) << "warn:" << message;
+      LOG(WARNING) << "warn:" << message_formatted;
       break;
     case static_cast<std::underlying_type<chromium::web::LogLevel>::type>(
         chromium::web::LogLevel::ERROR):
-      LOG(ERROR) << "error:" << message;
+      LOG(ERROR) << "error:" << message_formatted;
       break;
     default:
       DLOG(WARNING) << "Unknown log level: " << level;