Add IPC benchmarking API to Blink TestRunner

content/shell/renderer/webkit_test_runner.h

Index: content/shell/renderer/webkit_test_runner.h
diff --git a/content/shell/renderer/webkit_test_runner.h b/content/shell/renderer/webkit_test_runner.h
index 94fe374a763bee2e9b56d131b67df5e592dbb092..4423ac5a187db2f8f183fe0e2739e26c7474f745 100644
--- a/content/shell/renderer/webkit_test_runner.h
+++ b/content/shell/renderer/webkit_test_runner.h
@@ -30,6 +30,7 @@ struct WebRect;
 
 namespace content {
 
+class IPCEcho;
 class LeakDetector;
 class WebTestProxyBase;
 struct LeakDetectionResult;
@@ -114,6 +115,9 @@ class WebKitTestRunner : public RenderViewObserver,
                                const std::string& frame_name) OVERRIDE;
   virtual bool allowExternalPages() OVERRIDE;
   virtual std::string dumpHistoryForWindow(WebTestProxyBase* proxy) OVERRIDE;
+  virtual void requestEcho(int id, int size) OVERRIDE;
+  virtual int lastEchoId() OVERRIDE;
+  virtual int lastEchoSize() OVERRIDE;
 
   void Reset();
 
@@ -124,6 +128,7 @@ class WebKitTestRunner : public RenderViewObserver,
 
  private:
   // Message handlers.
+  void OnEchoPong(int id, const std::string& body);
   void OnSetTestConfiguration(const ShellTestConfiguration& params);
   void OnSessionHistory(
       const std::vector<int>& routing_ids,
@@ -156,6 +161,7 @@ class WebKitTestRunner : public RenderViewObserver,
   bool focus_on_next_commit_;
 
   scoped_ptr<LeakDetector> leak_detector_;
+  scoped_ptr<IPCEcho> ipc_echo_;
   bool needs_leak_detector_;
 
   DISALLOW_COPY_AND_ASSIGN(WebKitTestRunner);