Adds tracing to MHTML generation call chain.

content/renderer/render_frame_impl.cc

 // Copyright 2013 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/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 12 matching lines @@
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/process/process.h"
 #include "base/stl_util.h"
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
-#include "base/trace_event/trace_event_argument.h"
+#include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
 #include "cc/base/switches.h"
 #include "content/child/appcache/appcache_dispatcher.h"
 #include "content/child/quota_dispatcher.h"
 #include "content/child/request_extra_data.h"
 #include "content/child/service_worker/service_worker_handle_reference.h"
 #include "content/child/service_worker/service_worker_network_provider.h"
 #include "content/child/service_worker/service_worker_provider_context.h"
 #include "content/child/service_worker/web_service_worker_provider_impl.h"
 #include "content/child/v8_value_converter_impl.h"
@@ skipping 5116 matching lines @@
                                  frame_routing_id_to_local_path);
 
   // Serialize the frame (without recursing into subframes).
   WebFrameSerializer::serialize(GetWebFrame(),
                                 this,  // WebFrameSerializerClient.
                                 &delegate);
 }
 
 void RenderFrameImpl::OnSerializeAsMHTML(
     const FrameMsg_SerializeAsMHTML_Params& params) {
+  TRACE_EVENT0("page-serialization", "RenderFrameImpl::OnSerializeAsMHTML");
   // Unpack IPC payload.
   base::File file = IPC::PlatformFileForTransitToFile(params.destination_file);
   const WebString mhtml_boundary =
       WebString::fromUTF8(params.mhtml_boundary_marker);
   DCHECK(!mhtml_boundary.isEmpty());
 
   WebData data;
   std::set<std::string> digests_of_uris_of_serialized_resources;
   MHTMLPartsGenerationDelegate delegate(
       params, &digests_of_uris_of_serialized_resources);
 
   bool success = true;
 
   // Generate MHTML header if needed.
   if (IsMainFrame()) {
+    TRACE_EVENT0("page-serialization",
+                 "RenderFrameImpl::OnSerializeAsMHTML header");
     // |data| can be empty if the main frame should be skipped.  If the main
-    // frame is
-    // skipped, then the whole archive is bad, so bail to the error condition.
+    // frame is skipped, then the whole archive is bad, so bail to the error
+    // condition.
     WebData data = WebFrameSerializer::generateMHTMLHeader(
         mhtml_boundary, GetWebFrame(), &delegate);
     if (data.isEmpty() ||
         file.WriteAtCurrentPos(data.data(), data.size()) < 0) {
       success = false;
     }
   }
 
   // Generate MHTML parts.  Note that if this is not the main frame, then even
   // skipping the whole parts generation step is not an error - it simply
   // results in an omitted resource in the final file.
   if (success) {
+    TRACE_EVENT0("page-serialization",
+                 "RenderFrameImpl::OnSerializeAsMHTML parts serialization");
     // |data| can be empty if the frame should be skipped, but this is OK.
     data = WebFrameSerializer::generateMHTMLParts(mhtml_boundary, GetWebFrame(),
                                                   &delegate);
     // TODO(jcivelli): write the chunks in deferred tasks to give a chance to
     //                 the message loop to process other events.
+    TRACE_EVENT0("page-serialization",
+                 "RenderFrameImpl::OnSerializeAsMHTML parts file writing");
     if (!data.isEmpty() &&
         file.WriteAtCurrentPos(data.data(), data.size()) < 0) {
       success = false;
     }
   }
 
   // Generate MHTML footer if needed.
   if (success && params.is_last_frame) {
+    TRACE_EVENT0("page-serialization",
+                 "RenderFrameImpl::OnSerializeAsMHTML footer");
     data = WebFrameSerializer::generateMHTMLFooter(mhtml_boundary);
     if (file.WriteAtCurrentPos(data.data(), data.size()) < 0) {
       success = false;
     }
   }
 
   // Cleanup and notify the browser process about completion.
   file.Close();  // Need to flush file contents before sending IPC response.
   Send(new FrameHostMsg_SerializeAsMHTMLResponse(
       routing_id_, params.job_id, success,
@@ skipping 1166 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content