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..ff4634b49a651865ecc1bcf794fd15a9bd88bfc1 100644
--- a/components/web_view/frame.h
+++ b/components/web_view/frame.h
@@ -54,6 +54,7 @@ enum class ViewOwnership {
 class Frame : public mus::ViewObserver, public mojom::Frame {
  public:
   using ClientPropertyMap = std::map<std::string, std::vector<uint8_t>>;
+  using FindCallback = mojo::Callback<void(bool)>;
 
   Frame(FrameTree* tree,
         mus::View* view,
@@ -112,6 +113,15 @@ 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,
+            const FindCallback& callback);
+  void StopFinding(bool clear_selection);
+  void ScopeStringMatches(int32_t request_id,
+                          const mojo::String& search_text,
+                          bool reset);
+  void CancelPendingScopingEffort();
+
  private:
   friend class FrameTest;
   friend class FrameTree;
@@ -224,6 +234,11 @@ class Frame : public mus::ViewObserver, public mojom::Frame {
                        mojo::URLRequestPtr request) override;
   void DidNavigateLocally(const mojo::String& url) override;
   void DispatchLoadEventToParent() override;
+  void OnReportFindInFrameMatchCount(int32_t request_id,
+                                     int32_t count,
+                                     bool final_update) override;
+  void OnReportFindInPageSelection(int32_t request_id,
+                                   int32_t active_match_ordinal) override;
 
   FrameTree* const tree_;
   // WARNING: this may be null. See class description for details.