Add integration of the new heuristics

components/dom_distiller/content/distillable_page_utils.cc

Index: components/dom_distiller/content/distillable_page_utils.cc
diff --git a/components/dom_distiller/content/distillable_page_utils.cc b/components/dom_distiller/content/distillable_page_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..7f1b3ccc53b470a6c2521ccf0e34eefac486231a
--- /dev/null
+++ b/components/dom_distiller/content/distillable_page_utils.cc
@@ -0,0 +1,74 @@
+// 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 "components/dom_distiller/content/distillable_page_utils.h"
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "components/dom_distiller/core/distillable_page_detector.h"
+#include "components/dom_distiller/core/page_features.h"
+#include "content/public/browser/render_frame_host.h"
+#include "grit/components_resources.h"
+#include "ui/base/resource/resource_bundle.h"
+
+namespace dom_distiller {
+namespace {
+void OnOGArticleJsResult(base::Callback<void(bool)> callback,
+                         const base::Value* result) {
+  bool success = false;
+  if (result) {
+    result->GetAsBoolean(&success);
+  }
+  callback.Run(success);
+}
+
+void OnExtractFeaturesJsResult(const DistillablePageDetector* detector,
+                               base::Callback<void(bool)> callback,
+                               const base::Value* result) {
+  callback.Run(detector->Classify(CalculateDerivedFeaturesFromJSON(result)));
+}
+}  // namespace
+
+void IsOpenGraphArticle(content::WebContents* web_contents,
+                        base::Callback<void(bool)> callback) {
+  content::RenderFrameHost* main_frame = web_contents->GetMainFrame();
+  if (!main_frame) {
+    base::MessageLoop::current()->PostTask(FROM_HERE,
+                                           base::Bind(callback, false));
+    return;
+  }
+  std::string og_article_js = ResourceBundle::GetSharedInstance()
+                                  .GetRawDataResource(IDR_IS_DISTILLABLE_JS)
+                                  .as_string();
+  main_frame->ExecuteJavaScript(base::UTF8ToUTF16(og_article_js),
+                                base::Bind(OnOGArticleJsResult, callback));
+}
+
+void IsDistillablePage(content::WebContents* web_contents,
+                       base::Callback<void(bool)> callback) {
+  IsDistillablePageForDetector(web_contents,
+                               DistillablePageDetector::GetDefault(), callback);
+}
+
+void IsDistillablePageForDetector(content::WebContents* web_contents,
+                                  const DistillablePageDetector* detector,
+                                  base::Callback<void(bool)> callback) {
+  content::RenderFrameHost* main_frame = web_contents->GetMainFrame();
+  if (!main_frame) {
+    base::MessageLoop::current()->PostTask(FROM_HERE,
+                                           base::Bind(callback, false));
+    return;
+  }
+  std::string extract_features_js =
+      ResourceBundle::GetSharedInstance()
+          .GetRawDataResource(IDR_EXTRACT_PAGE_FEATURES_JS)
+          .as_string();
+  main_frame->ExecuteJavaScript(
+      base::UTF8ToUTF16(extract_features_js),
+      base::Bind(OnExtractFeaturesJsResult, detector, callback));
+}
+
+}  // namespace dom_distiller