[MediaRouter] Replace RouteMessage with PresentationConnectionMessage

chrome/browser/media/router/test_helper.cc

Index: chrome/browser/media/router/test_helper.cc
diff --git a/chrome/browser/media/router/test_helper.cc b/chrome/browser/media/router/test_helper.cc
index b41874300c6663ae1737894d5d5cb70c1520e606..17122d423979f063ea2f41ed9b32aee6a05e1c2b 100644
--- a/chrome/browser/media/router/test_helper.cc
+++ b/chrome/browser/media/router/test_helper.cc
@@ -4,10 +4,30 @@
 
 #include "chrome/browser/media/router/test_helper.h"
 
+#include "base/base64.h"
+#include "base/json/string_escape.h"
 #include "chrome/common/media_router/media_source.h"
 
 namespace media_router {
 
+std::string PresentationConnectionMessageToString(
+    const content::PresentationConnectionMessage& message) {
+  if (!message.message && !message.data)
+    return "null";
+  std::string result;
+  if (message.message) {
+    result = "text=";
+    base::EscapeJSONString(*message.message, true, &result);
+  } else {
+    const base::StringPiece src(
+        reinterpret_cast<const char*>(message.data->data()),
+        message.data->size());
+    base::Base64Encode(src, &result);
+    result = "binary=" + result;
+  }
+  return result;
+}
+
 MockIssuesObserver::MockIssuesObserver(MediaRouter* router)
     : IssuesObserver(router) {}
 MockIssuesObserver::~MockIssuesObserver() {}