[Presentation API] Allow PresentationConnection state change to "Connecting"

third_party/WebKit/Source/modules/presentation/PresentationConnection.cpp

 // Copyright 2014 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 "modules/presentation/PresentationConnection.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMArrayBufferView.h"
 #include "core/dom/Document.h"
@@ skipping 405 matching lines @@
   return m_url == url && m_id == id;
 }
 
 void PresentationConnection::didChangeState(
     WebPresentationConnectionState state) {
   if (m_state == state)
     return;
 
   m_state = state;
   switch (m_state) {
+    // There is no event handler for state changes to Connecting.
     case WebPresentationConnectionState::Connecting:
-      NOTREACHED();
       return;
     case WebPresentationConnectionState::Connected:
       dispatchStateChangeEvent(Event::create(EventTypeNames::connect));
       return;
     case WebPresentationConnectionState::Terminated:
       dispatchStateChangeEvent(Event::create(EventTypeNames::terminate));
       return;
     // Closed state is handled in |didClose()|.
     case WebPresentationConnectionState::Closed:
       NOTREACHED();
@@ skipping 56 matching lines @@
 void PresentationConnection::tearDown() {
   // Cancel current Blob loading if any.
   if (m_blobLoader) {
     m_blobLoader->cancel();
     m_blobLoader.clear();
   }
   m_messages.clear();
 }
 
 }  // namespace blink