[chromedriver] Send all OnConnected before any OnEvent when connected.

chrome/test/chromedriver/frame_tracker.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/test/chromedriver/frame_tracker.h"
 
 #include <utility>
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 18 matching lines @@
 
 Status FrameTracker::GetContextIdForFrame(
     const std::string& frame_id, int* context_id) {
   if (frame_to_context_map_.count(frame_id) == 0)
     return Status(kUnknownError, "frame does not have execution context");
   *context_id = frame_to_context_map_[frame_id];
   return Status(kOk);
 }
 
 Status FrameTracker::OnConnected() {
+  frame_to_context_map_.clear();
+  context_to_frame_map_.clear();
   // Enable runtime events to allow tracking execution context creation.
   base::DictionaryValue params;
   Status status = client_->SendCommand("Runtime.enable", params);
   if (status.IsError())
     return status;
   return client_->SendCommand("DOM.getDocument", params);
 }
 
 void FrameTracker::OnEvent(const std::string& method,
                            const base::DictionaryValue& params) {
@@ skipping 13 matching lines @@
                  << json;
       return;
     }
     frame_to_context_map_.insert(std::make_pair(frame_id, context_id));
     context_to_frame_map_.insert(std::make_pair(context_id, frame_id));
   } else if (method == "DOM.documentUpdated") {
     frame_to_context_map_.clear();
     context_to_frame_map_.clear();
   }
 }