In chromedriver, add /log url

chrome/test/automation/automation_json_requests.cc

Index: chrome/test/automation/automation_json_requests.cc
diff --git a/chrome/test/automation/automation_json_requests.cc b/chrome/test/automation/automation_json_requests.cc
index c05770b023341dc81068215efe1f080aa0522064..80e58410d18fa3af8800276ccf8c6e6405793f5f 100644
--- a/chrome/test/automation/automation_json_requests.cc
+++ b/chrome/test/automation/automation_json_requests.cc
@@ -29,11 +29,12 @@ bool SendAutomationJSONRequest(AutomationMessageSender* sender,
   bool success = false;
   int timeout_ms = TestTimeouts::action_max_timeout_ms();
   base::Time before_sending = base::Time::Now();
+  std::string command;
+  request_dict.GetString("command", &command);
+  LOG(INFO) << "Sending '" << command << "' command.";
   if (!SendAutomationJSONRequest(
           sender, request, timeout_ms, &reply, &success)) {
     int64 elapsed_ms = (base::Time::Now() - before_sending).InMilliseconds();
-    std::string command;
-    request_dict.GetString("command", &command);
     if (elapsed_ms >= timeout_ms) {
       *error_msg = base::StringPrintf(
           "Chrome did not respond to '%s'. Request may have timed out. "
@@ -55,15 +56,12 @@ bool SendAutomationJSONRequest(AutomationMessageSender* sender,
   }
   scoped_ptr<Value> value(base::JSONReader::Read(reply, true));
   if (!value.get() || !value->IsType(Value::TYPE_DICTIONARY)) {
-    std::string command;
-    request_dict.GetString("command", &command);
     LOG(ERROR) << "JSON request did not return dict: " << command << "\n";
     return false;
   }
   DictionaryValue* dict = static_cast<DictionaryValue*>(value.get());
   if (!success) {
-    std::string command, error;
-    request_dict.GetString("command", &command);
+    std::string error;
     dict->GetString("error", &error);
     *error_msg = base::StringPrintf(
         "Internal Chrome error during '%s': (%s). Request details: (%s).",