Update instrumentation for many different bugs based on new UMA data.

content/browser/service_worker/service_worker_request_handler.cc

 // 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 "content/browser/service_worker/service_worker_request_handler.h"
 
 #include <string>
 
-#include "base/profiler/scoped_tracker.h"
 #include "content/browser/service_worker/service_worker_context_core.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/browser/service_worker/service_worker_provider_host.h"
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/browser/service_worker/service_worker_url_request_job.h"
 #include "content/browser/service_worker/service_worker_utils.h"
 #include "content/common/resource_request_body.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/public/browser/resource_context.h"
 #include "net/base/net_util.h"
@@ skipping 37 matching lines @@
     storage::BlobStorageContext* blob_storage_context,
     int process_id,
     int provider_id,
     bool skip_service_worker,
     FetchRequestMode request_mode,
     FetchCredentialsMode credentials_mode,
     ResourceType resource_type,
     RequestContextType request_context_type,
     RequestContextFrameType frame_type,
     scoped_refptr<ResourceRequestBody> body) {
-  // TODO(pkasting): Remove ScopedTracker below once crbug.com/456331 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "456331 ServiceWorkerRequestHandler::InitializeHandler"));
   if (!request->url().SchemeIsHTTPOrHTTPS())
     return;
 
   if (!context_wrapper || !context_wrapper->context() ||
       provider_id == kInvalidServiceWorkerProviderId) {
     return;
   }
 
   ServiceWorkerProviderHost* provider_host =
       context_wrapper->context()->GetProviderHost(process_id, provider_id);
@@ skipping 87 matching lines @@
     ResourceType resource_type)
     : context_(context),
       provider_host_(provider_host),
       blob_storage_context_(blob_storage_context),
       resource_type_(resource_type),
       old_process_id_(0),
       old_provider_id_(kInvalidServiceWorkerProviderId) {
 }
 
 }  // namespace content