Mojoify the RequestThumbnailForContextNode IPC message and reply

chrome/renderer/chrome_render_frame_observer.h

Index: chrome/renderer/chrome_render_frame_observer.h
diff --git a/chrome/renderer/chrome_render_frame_observer.h b/chrome/renderer/chrome_render_frame_observer.h
index a02f5d45b017819cf0bcb9a183d56e81f3f300e3..d4c22b8c6b98fd51545b317850dd814e1c0f7bae 100644
--- a/chrome/renderer/chrome_render_frame_observer.h
+++ b/chrome/renderer/chrome_render_frame_observer.h
@@ -9,6 +9,7 @@
 #include "base/timer/timer.h"
 #include "chrome/common/image_context_menu_renderer.mojom.h"
 #include "chrome/common/prerender_types.h"
+#include "chrome/common/thumbnail_capturer.mojom.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 
@@ -28,7 +29,8 @@ class TranslateHelper;
 // lifetime.
 class ChromeRenderFrameObserver
     : public content::RenderFrameObserver,
-      public chrome::mojom::ImageContextMenuRenderer {
+      public chrome::mojom::ImageContextMenuRenderer,
+      public chrome::mojom::ThumbnailCapturer {
  public:
   explicit ChromeRenderFrameObserver(content::RenderFrame* render_frame);
   ~ChromeRenderFrameObserver() override;
@@ -48,9 +50,17 @@ class ChromeRenderFrameObserver
   // chrome::mojom::ImageContextMenuRenderer:
   void RequestReloadImageForContextNode() override;
 
+  // chrome::mojom::ThumbnailCapturer:
+  void RequestThumbnailForContextNode(
+      int32_t thumbnail_min_area_pixels,
+      const gfx::Size& thumbnail_max_size_pixels,
+      const RequestThumbnailForContextNodeCallback& callback) override;
+
   // Mojo handlers.
   void OnImageContextMenuRendererRequest(
       chrome::mojom::ImageContextMenuRendererRequest request);
+  void OnThumbnailCapturerRequest(
+      chrome::mojom::ThumbnailCapturerRequest request);
 
   // IPC handlers
   void OnSetIsPrerendering(prerender::PrerenderMode mode);
@@ -78,6 +88,9 @@ class ChromeRenderFrameObserver
   mojo::BindingSet<chrome::mojom::ImageContextMenuRenderer>
       image_context_menu_renderer_bindings_;
 
+  mojo::BindingSet<chrome::mojom::ThumbnailCapturer>
+      thumbnail_capturer_bindings_;
+
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderFrameObserver);
 };