Record histograms for timing information in DomDistiller.

components/dom_distiller/core/distiller_page.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 "components/dom_distiller/core/distiller_page.h"
 
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
 #include "grit/component_resources.h"
 #include "third_party/dom_distiller_js/dom_distiller.pb.h"
 #include "third_party/dom_distiller_js/dom_distiller_json_converter.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "url/gurl.h"
 
 namespace dom_distiller {
 
 namespace {
 
@@ skipping 107 matching lines @@
           src_markup_info.images(i);
       DistilledPageInfo::MarkupImage dst_image;
       dst_image.url = src_image.url();
       dst_image.secure_url = src_image.secure_url();
       dst_image.type = src_image.type();
       dst_image.caption = src_image.caption();
       dst_image.width = src_image.width();
       dst_image.height = src_image.height();
       dst_markup_info.images.push_back(dst_image);
     }
+    if (distiller_result.has_timing_info()) {
+      const dom_distiller::proto::TimingInfo& timing =
+          distiller_result.timing_info();
+      if (timing.has_markup_parsing_time()) {
+        UMA_HISTOGRAM_TIMES(
+            "DomDistiller.Time.MarkupParsing",
+            base::TimeDelta::FromMillisecondsD(timing.markup_parsing_time()));
+      }
+      if (timing.has_document_construction_time()) {
+        UMA_HISTOGRAM_TIMES(
+            "DomDistiller.Time.DocumentConstruction",
+            base::TimeDelta::FromMillisecondsD(
+                timing.document_construction_time()));
+      }
+      if (timing.has_article_processing_time()) {
+        UMA_HISTOGRAM_TIMES(
+            "DomDistiller.Time.ArticleProcessing",
+            base::TimeDelta::FromMillisecondsD(
+                timing.article_processing_time()));
+      }
+      if (timing.has_formatting_time()) {
+        UMA_HISTOGRAM_TIMES(
+            "DomDistiller.Time.Formatting",
+            base::TimeDelta::FromMillisecondsD(timing.formatting_time()));
+      }
+      if (timing.has_total_time()) {
+        UMA_HISTOGRAM_TIMES(
+            "DomDistiller.Time.DistillationTotal",
+            base::TimeDelta::FromMillisecondsD(timing.total_time()));
+      }
+    }
   }
 
   base::MessageLoop::current()->PostTask(
       FROM_HERE,
       base::Bind(
           distiller_page_callback_, base::Passed(&page_info), found_content));
 }
 
 }  // namespace dom_distiller