Add common page filtering logic for page load metrics.

chrome/renderer/page_load_metrics/renderer_page_track_decider.cc

+// Copyright 2016 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/renderer_page_track_decider.h"
+
+#include <string>
+
+#include "chrome/renderer/searchbox/search_bouncer.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 "url/gurl.h"
+
+namespace page_load_metrics {
+
+RendererPageTrackDecider::RendererPageTrackDecider(
+    const blink::WebDocument* document,
+    const blink::WebDataSource* data_source)
+    : document_(document), data_source_(data_source) {}
+
+RendererPageTrackDecider::~RendererPageTrackDecider() {}
+
+bool RendererPageTrackDecider::HasCommitted() {
+  // RendererPageTrackDecider is only instantiated for committed pages.
+  return true;
+}
+
+bool RendererPageTrackDecider::IsHttpOrHttpsUrl() {
+  return static_cast<GURL>(document_->url()).SchemeIsHTTPOrHTTPS();
+}
+
+bool RendererPageTrackDecider::IsNewTabPageUrl() {
+  return SearchBouncer::GetInstance()->IsNewTabPage(document_->url());
+}
+
+bool RendererPageTrackDecider::IsChromeErrorPage() {
+  return data_source_->hasUnreachableURL();
+}
+
+int RendererPageTrackDecider::GetHttpStatusCode() {
+  return data_source_->response().httpStatusCode();
+}
+
+bool RendererPageTrackDecider::IsHtmlOrXhtmlPage() {
+  // 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).
+  blink::WebString mime_type = data_source_->response().mimeType();
+  return mime_type == "text/html" || mime_type == "application/xhtml+xml";
+}
+
+}  // namespace page_load_metrics