DevTools: make network conditions emulation scoped (blink)

Source/core/inspector/InspectorResourceAgent.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 64 matching lines @@
 static const char resourceAgentEnabled[] = "resourceAgentEnabled";
 static const char extraRequestHeaders[] = "extraRequestHeaders";
 static const char cacheDisabled[] = "cacheDisabled";
 static const char userAgentOverride[] = "userAgentOverride";
 }
 
 namespace {
 
 // Keep in sync with kDevToolsRequestInitiator defined in devtools_network_controller.cc
 const char kDevToolsRequestInitiator[] = "X-DevTools-Request-Initiator";
+const char kDevToolsEmulateNetworkConditionsClientId[] = "X-DevTools-Emulate-Network-Conditions-Client-Id";
 
 static PassRefPtr<JSONObject> buildObjectForHeaders(const HTTPHeaderMap& headers)
 {
     RefPtr<JSONObject> headersObject = JSONObject::create();
     HTTPHeaderMap::const_iterator end = headers.end();
     for (HTTPHeaderMap::const_iterator it = headers.begin(); it != end; ++it)
         headersObject->setString(it->key.string(), it->value);
     return headersObject;
 }
 
@@ skipping 196 matching lines @@
         disable(&error);
     }
     ASSERT(!m_instrumentingAgents->inspectorResourceAgent());
 }
 
 void InspectorResourceAgent::willSendRequest(unsigned long identifier, DocumentLoader* loader, ResourceRequest& request, const ResourceResponse& redirectResponse, const FetchInitiatorInfo& initiatorInfo)
 {
     // Ignore the request initiated internally.
     if (initiatorInfo.name == FetchInitiatorTypeNames::internal)
         return;
+
+    if (!m_hostId.isEmpty())
+        request.addHTTPHeaderField(kDevToolsEmulateNetworkConditionsClientId, AtomicString(m_hostId));
+
     String requestId = IdentifiersFactory::requestId(identifier);
     m_resourcesData->resourceCreated(requestId, m_pageAgent->loaderId(loader));
 
     RefPtr<JSONObject> headers = m_state->getObject(ResourceAgentState::extraRequestHeaders);
 
     if (headers) {
         JSONObject::const_iterator end = headers->end();
         for (JSONObject::const_iterator it = headers->begin(); it != end; ++it) {
             String value;
             if (it->value->asString(&value))
@@ skipping 511 matching lines @@
 InspectorResourceAgent::InspectorResourceAgent(InspectorPageAgent* pageAgent)
     : InspectorBaseAgent<InspectorResourceAgent>("Network")
     , m_pageAgent(pageAgent)
     , m_frontend(0)
     , m_resourcesData(adoptPtr(new NetworkResourcesData()))
     , m_isRecalculatingStyle(false)
 {
 }
 
 } // namespace WebCore