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

content/browser/appcache/appcache_interceptor.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/appcache/appcache_interceptor.h"
 
-#include "base/profiler/scoped_tracker.h"
 #include "content/browser/appcache/appcache_backend_impl.h"
 #include "content/browser/appcache/appcache_host.h"
 #include "content/browser/appcache/appcache_request_handler.h"
 #include "content/browser/appcache/appcache_service_impl.h"
 #include "content/browser/appcache/appcache_url_request_job.h"
 #include "content/common/appcache_interfaces.h"
 #include "net/url_request/url_request.h"
 
 static int kHandlerKey;  // Value is not used.
 
@@ skipping 10 matching lines @@
       request->GetUserData(&kHandlerKey));
 }
 
 void AppCacheInterceptor::SetExtraRequestInfo(
     net::URLRequest* request,
     AppCacheServiceImpl* service,
     int process_id,
     int host_id,
     ResourceType resource_type,
     bool should_reset_appcache) {
-  // TODO(pkasting): Remove ScopedTracker below once crbug.com/456331 is fixed.
-  tracked_objects::ScopedTracker tracking_profile(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "456331 AppCacheInterceptor::SetExtraRequestInfo"));
   if (!service || (host_id == kAppCacheNoHostId))
     return;
 
   AppCacheBackendImpl* backend = service->GetBackend(process_id);
   if (!backend)
     return;
 
   // TODO(michaeln): An invalid host id is indicative of bad data
   // from a child process. How should we handle that here?
   AppCacheHost* host = backend->GetHost(host_id);
@@ skipping 74 matching lines @@
 
 net::URLRequestJob* AppCacheInterceptor::MaybeInterceptResponse(
     net::URLRequest* request, net::NetworkDelegate* network_delegate) const {
   AppCacheRequestHandler* handler = GetHandler(request);
   if (!handler)
     return NULL;
   return handler->MaybeLoadFallbackForResponse(request, network_delegate);
 }
 
 }  // namespace content