Add webdriver endpoint to send custom debugger commands

chrome/test/chromedriver/server/http_handler.cc

Index: chrome/test/chromedriver/server/http_handler.cc
diff --git a/chrome/test/chromedriver/server/http_handler.cc b/chrome/test/chromedriver/server/http_handler.cc
index af0c443b22fb6542d07084f487a7f7092284518c..4be19a20a716fd7002e469cd713174aa5eca77db 100644
--- a/chrome/test/chromedriver/server/http_handler.cc
+++ b/chrome/test/chromedriver/server/http_handler.cc
@@ -611,6 +611,15 @@ HttpHandler::HttpHandler(
                      "session/:sessionId/touch/pinch",
                      WrapToCommand("TouchPinch",
                                    base::Bind(&ExecuteTouchPinch))),
+      CommandMapping(kPost,
+                     "session/:sessionId/chromium/sendcommand",

[johnchen, 2017/04/26 05:17:47]

It seems to be more common for the words to be separated by underscores, even
though this isn't done consistently. I'd suggest to make the string
".../send_command".

[em, 2017/04/27 05:02:09]

Done.

+                     WrapToCommand("ExecuteSendCommand",

[johnchen, 2017/04/26 05:17:47]

By convention, the string should be "SendCommand", without the "Execute" prefix.
Only the method name uses the Execute prefix.

[em, 2017/04/27 05:02:09]

Done.

+                                   base::Bind(&ExecuteSendCommand))),
+      CommandMapping(
+              kPost,
+              "session/:sessionId/chromium/sendcommandandgetresult",
+              WrapToCommand("ExecuteSendCommandAndGetResult",
+                  base::Bind(&ExecuteSendCommandAndGetResult))),
   };
   command_map_.reset(
       new CommandMap(commands, commands + arraysize(commands)));