mandoline: Add find in page.

components/web_view/public/interfaces/web_view.mojom

Index: components/web_view/public/interfaces/web_view.mojom
diff --git a/components/web_view/public/interfaces/web_view.mojom b/components/web_view/public/interfaces/web_view.mojom
index 1385b8de2d50b4a047e1a6cc2a102108516132e8..9c4ace6196b021190fb2acea9fc63e0887f0c984 100644
--- a/components/web_view/public/interfaces/web_view.mojom
+++ b/components/web_view/public/interfaces/web_view.mojom
@@ -27,6 +27,12 @@ interface WebViewClient {
 
   // TODO(beng): also forward text direction.
   TitleChanged(string? title);
+
+  // Reports the number of matches for a given find.
+  ReportFindInPageMatchCount(int32 request_id, int32 count, bool final_update);
+
+  // Reports which match is currently highlighted.
+  ReportFindInPageSelection(int32 request_id, int32 active_match_ordinal);
 };
 
 interface WebView {
@@ -36,6 +42,10 @@ interface WebView {
   // Provide a ViewTreeClient for this specific WebView.
   GetViewTreeClient(mojo.ViewTreeClient& view_tree_client);
 
+  // Finds a string in page.
+  Find(int32 request_id, string search_text);
+  StopFinding();
+  
   // Moves forward and backward.
   GoBack();
   GoForward();