[ServiceWorker] Don't send the UMA related headers to the ServiceWorker.

chrome/browser/devtools/devtools_network_transaction.h

 // 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.
 
 #ifndef CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_TRANSACTION_H_
 #define CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_TRANSACTION_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "net/base/completion_callback.h"
@@ skipping 23 matching lines @@
 class DevToolsNetworkControllerHelper;
 }
 
 // DevToolsNetworkTransaction is a wrapper for network transaction. All
 // HttpTransaction methods are proxied to real transaction, but |callback|
 // parameter is saved and replaced with proxy callback. Fail method should be
 // used to simulate network outage. It runs saved callback (if any) with
 // net::ERR_INTERNET_DISCONNECTED result value.
 class DevToolsNetworkTransaction : public net::HttpTransaction {
  public:
+  static const char kDevToolsRequestInitiator[];
+  static const char kDevToolsEmulateNetworkConditionsClientId[];
+
   DevToolsNetworkTransaction(
       DevToolsNetworkController* controller,
       scoped_ptr<net::HttpTransaction> network_transaction);
 
   ~DevToolsNetworkTransaction() override;
 
   const net::HttpRequestInfo* request() const { return request_; }
 
   // Checks if request contains DevTools specific headers. Found values are
   // remembered and corresponding keys are removed from headers.
@@ skipping 99 matching lines @@
   int throttled_result_;
   int64_t throttled_byte_count_;
   CallbackType callback_type_;
   net::CompletionCallback proxy_callback_;
   net::CompletionCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(DevToolsNetworkTransaction);
 };
 
 #endif  // CHROME_BROWSER_DEVTOOLS_DEVTOOLS_NETWORK_TRANSACTION_H_