mandoline: Add find in page.

components/web_view/frame.h

Index: components/web_view/frame.h
diff --git a/components/web_view/frame.h b/components/web_view/frame.h
index 380bc8e822d6b860f75860f388f047fb430c0ea6..457621da67246e677ee84e41f0eb4f0a566ad65f 100644
--- a/components/web_view/frame.h
+++ b/components/web_view/frame.h
@@ -112,6 +112,9 @@ class Frame : public mus::ViewObserver, public mojom::Frame {
   // children, as well as the number of Frames accumulated.
   double GatherProgress(int* frame_count) const;
 
+  void Find(int32_t request_id, const mojo::String& search_text);
+  void StopFinding();
+
  private:
   friend class FrameTest;
   friend class FrameTree;
@@ -224,6 +227,11 @@ class Frame : public mus::ViewObserver, public mojom::Frame {
                        mojo::URLRequestPtr request) override;
   void DidNavigateLocally(const mojo::String& url) override;
   void DispatchLoadEventToParent() override;
+  void ReportFindInPageMatchCount(int32_t request_id,
+                                  int32_t count,
+                                  bool final_update) override;
+  void ReportFindInPageSelection(int32_t request_id,
+                                 int32_t active_match_ordinal) override;
 
   FrameTree* const tree_;
   // WARNING: this may be null. See class description for details.