Add common page filtering logic for page load metrics.

chrome/renderer/page_load_metrics/metrics_render_frame_observer.cc

 // Copyright 2015 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 "chrome/renderer/page_load_metrics/metrics_render_frame_observer.h"
 
 #include <string>
 
 #include "base/memory/ptr_util.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "chrome/renderer/page_load_metrics/page_timing_metrics_sender.h"
+#include "chrome/renderer/page_load_metrics/renderer_page_track_decider.h"
 #include "chrome/renderer/searchbox/search_bouncer.h"
 #include "content/public/renderer/render_frame.h"
-#include "third_party/WebKit/public/platform/WebURLResponse.h"
 #include "third_party/WebKit/public/web/WebDataSource.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "third_party/WebKit/public/web/WebPerformance.h"
 #include "url/gurl.h"
 
 namespace page_load_metrics {
 
 namespace {
 
@@ skipping 53 matching lines @@
   if (HasNoRenderFrame())
     return;
   PageLoadTiming timing(GetTiming());
   page_timing_metrics_sender_->Send(timing);
 }
 
 bool MetricsRenderFrameObserver::ShouldSendMetrics() const {
   if (HasNoRenderFrame())
     return false;
   const blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
-  // We only generate historgrams for main frames.
+  // We only track metrics for main frames.
   if (frame->parent())
     return false;
 
   const blink::WebDocument& document = frame->document();
-  // Ignore non-HTTP schemes (e.g. chrome://).
-  const GURL& url = document.url();
-  if (!url.SchemeIsHTTPOrHTTPS())
-    return false;
-
-  // Ignore NTP loads.
-  if (SearchBouncer::GetInstance()->IsNewTabPage(url))
-    return false;
-
-  // Ignore non-HTML documents (e.g. SVG). Note that images are treated by
-  // Blink as HTML documents, so to exclude images, we must perform
-  // additional mime type checking below.
-  if (!document.isHTMLDocument() && !document.isXHTMLDocument())
-    return false;
-
-  // Ignore non-HTML mime types (e.g. images).
-  const blink::WebURLResponse& url_response = frame->dataSource()->response();
-  std::string mime_type = url_response.mimeType().utf8();
-  if (mime_type != "text/html" && mime_type != "application/xhtml+xml")
-    return false;
-
-  return true;
+  return RendererPageTrackDecider(&document, frame->dataSource()).ShouldTrack();
 }
 
 PageLoadTiming MetricsRenderFrameObserver::GetTiming() const {
   const blink::WebPerformance& perf =
       render_frame()->GetWebFrame()->performance();
 
   PageLoadTiming timing;
   double start = perf.navigationStart();
   timing.navigation_start = base::Time::FromDoubleT(start);
   if (perf.responseStart() > 0.0)
@@ skipping 50 matching lines @@
   bool no_frame = !render_frame() || !render_frame()->GetWebFrame();
   DCHECK(!no_frame);
   return no_frame;
 }
 
 void MetricsRenderFrameObserver::OnDestruct() {
   delete this;
 }
 
 }  // namespace page_load_metrics