Expose distiller functions to JavaScript

components/dom_distiller/content/renderer/distiller_js_render_frame_observer.h

Index: components/dom_distiller/content/renderer/distiller_js_render_frame_observer.h
diff --git a/components/dom_distiller/content/renderer/distiller_js_render_frame_observer.h b/components/dom_distiller/content/renderer/distiller_js_render_frame_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..5c087b50850f356c423646954937652f216bd8d3
--- /dev/null
+++ b/components/dom_distiller/content/renderer/distiller_js_render_frame_observer.h
@@ -0,0 +1,44 @@
+// 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.
+
+#ifndef COMPONENTS_DOM_DISTILLER_CONTENT_RENDERER_DISTILLER_JS_RENDER_FRAME_OBSERVER_H_
+#define COMPONENTS_DOM_DISTILLER_CONTENT_RENDERER_DISTILLER_JS_RENDER_FRAME_OBSERVER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "components/dom_distiller/content/common/distiller_javascript_service.mojom.h"
+#include "components/dom_distiller/content/renderer/distiller_native_javascript.h"
+#include "components/dom_distiller/content/renderer/distiller_page_notifier_service_impl.h"
+#include "content/public/renderer/render_frame.h"
+#include "content/public/renderer/render_frame_observer.h"
+#include "third_party/WebKit/public/web/WebLocalFrame.h"
+#include "v8/include/v8.h"
+
+namespace dom_distiller {
+
+class DistillerJsRenderFrameObserver : public content::RenderFrameObserver {
+ public:
+  DistillerJsRenderFrameObserver(content::RenderFrame* render_frame);
+  // RenderFrameObserver implementation.
+  void DidStartProvisionalLoad() override;
+  void DidClearWindowObject() override;
+  ~DistillerJsRenderFrameObserver() override;
+
+  void RegisterMojoService();

[nyquist, 2015/07/27 21:44:33]

How do these two methods below differ? Could you add some short comments?

[mdjones, 2015/07/28 20:53:41]

One of the function names needed to be updated. Done.

+  void SetupMojoForJavaScript();

[nyquist, 2015/07/27 21:44:33]

Why is this method public? Isn't it only called from DidStartProvisionalLoad() ?

[mdjones, 2015/07/28 20:53:42]

No, it is called by the DistillerPageNotifierImpl.

+
+ private:
+  void createDistillerPageNotifierService(

[nyquist, 2015/07/27 21:44:33]

createDistillerPageNotifierService

[mdjones, 2015/07/28 20:53:42]

That is what it currently is.

+      mojo::InterfaceRequest<DistillerPageNotifierService> request);
+
+  // Track if the current page is distilled. This is needed for testing.
+  bool is_distiller_page_;
+
+  // Handle to "distiller" JavaScript object functionality.
+  scoped_ptr<DistillerNativeJavaScript> native_javascript_handle_;
+  base::WeakPtrFactory<DistillerJsRenderFrameObserver> weak_factory_;
+};
+
+}  // namespace dom_distiller
+
+#endif  // COMPONENTS_DOM_DISTILLER_CONTENT_RENDERER_DISTILLER_JS_RENDER_FRAME_OBSERVER_H_