Adding instrumentation to locate the source of jankiness.

content/browser/appcache/view_appcache_internals_job.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/view_appcache_internals_job.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/format_macros.h"
 #include "base/i18n/time_formatting.h"
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
+#include "base/profiler/scoped_profile.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/appcache/appcache.h"
 #include "content/browser/appcache/appcache_group.h"
 #include "content/browser/appcache/appcache_policy.h"
 #include "content/browser/appcache/appcache_response.h"
 #include "content/browser/appcache/appcache_service_impl.h"
 #include "content/browser/appcache/appcache_storage.h"
@@ skipping 326 matching lines @@
         info_collection_.get(),
         base::Bind(&MainPageJob::OnGotInfoComplete,
                    weak_factory_.GetWeakPtr()));
   }
 
   // Produces a page containing the listing
   virtual int GetData(std::string* mime_type,
                       std::string* charset,
                       std::string* out,
                       const net::CompletionCallback& callback) const override {
+    // TODO(vadimt): Remove ScopedProfile below once crbug.com/422489 is fixed.
+    tracked_objects::ScopedProfile tracking_profile(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION("422489 MainPageJob::GetData"));
+
     mime_type->assign("text/html");
     charset->assign("UTF-8");
 
     out->clear();
     EmitPageStart(out);
     if (!info_collection_.get()) {
       out->append(kErrorMessage);
     } else if (info_collection_->infos_by_origin.empty()) {
       out->append(kEmptyAppCachesMessage);
     } else {
@@ skipping 102 matching lines @@
   virtual void Start() override {
     DCHECK(request_);
     appcache_storage_->LoadOrCreateGroup(manifest_url_, this);
   }
 
   // Produces a page containing the entries listing.
   virtual int GetData(std::string* mime_type,
                       std::string* charset,
                       std::string* out,
                       const net::CompletionCallback& callback) const override {
+    // TODO(vadimt): Remove ScopedProfile below once crbug.com/422489 is fixed.
+    tracked_objects::ScopedProfile tracking_profile(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION("422489 ViewAppCacheJob::GetData"));
+
     mime_type->assign("text/html");
     charset->assign("UTF-8");
     out->clear();
     EmitPageStart(out);
     if (appcache_info_.manifest_url.is_empty()) {
       out->append(kManifestNotFoundMessage);
     } else {
       GURL base_url = ClearQuery(request_->url());
       EmitAppCacheInfo(base_url, appcache_service_, &appcache_info_, out);
       EmitAppCacheResourceInfoVector(base_url,
@@ skipping 56 matching lines @@
     DCHECK(request_);
     appcache_storage_->LoadResponseInfo(
         manifest_url_, group_id_, response_id_, this);
   }
 
   // Produces a page containing the response headers and data.
   virtual int GetData(std::string* mime_type,
                       std::string* charset,
                       std::string* out,
                       const net::CompletionCallback& callback) const override {
+    // TODO(vadimt): Remove ScopedProfile below once crbug.com/422489 is fixed.
+    tracked_objects::ScopedProfile tracking_profile(
+        FROM_HERE_WITH_EXPLICIT_FUNCTION("422489 ViewEntryJob::GetData"));
+
     mime_type->assign("text/html");
     charset->assign("UTF-8");
     out->clear();
     EmitPageStart(out);
     EmitAnchor(entry_url_.spec(), entry_url_.spec(), out);
     out->append("<br/>\n");
     if (response_info_.get()) {
       if (response_info_->http_response_info())
         EmitResponseHeaders(response_info_->http_response_info()->headers.get(),
                             out);
@@ skipping 90 matching lines @@
     return new ViewEntryJob(request, network_delegate, service,
                             DecodeBase64URL(tokens[0]),  // manifest url
                             DecodeBase64URL(tokens[1]),  // entry url
                             response_id, group_id);
   }
 
   return new RedirectToMainPageJob(request, network_delegate, service);
 }
 
 }  // namespace content