Add webdriver endpoint to send custom debugger commands

chrome/test/chromedriver/chrome/stub_web_view.h

Index: chrome/test/chromedriver/chrome/stub_web_view.h
diff --git a/chrome/test/chromedriver/chrome/stub_web_view.h b/chrome/test/chromedriver/chrome/stub_web_view.h
index 84397ddf3663ef845ec9aaef7a43af906f6f64c0..34d596d3babee1e7186f10a10acb7414e808f7c7 100644
--- a/chrome/test/chromedriver/chrome/stub_web_view.h
+++ b/chrome/test/chromedriver/chrome/stub_web_view.h
@@ -25,6 +25,11 @@ class StubWebView : public WebView {
   Status GetUrl(std::string* url) override;
   Status Load(const std::string& url, const Timeout* timeout) override;
   Status Reload(const Timeout* timeout) override;
+  Status SendCommand(const std::string& cmd,
+                     const base::DictionaryValue& params) override;
+  Status SendCommandAndGetResult(const std::string& cmd,
+                                 const base::DictionaryValue& params,
+                                 std::unique_ptr<base::Value>* value) override;
   Status TraverseHistory(int delta, const Timeout* timeout) override;
   Status EvaluateScript(const std::string& frame,
                         const std::string& function,