mandoline: Add find in page.

components/web_view/public/interfaces/frame.mojom

Index: components/web_view/public/interfaces/frame.mojom
diff --git a/components/web_view/public/interfaces/frame.mojom b/components/web_view/public/interfaces/frame.mojom
index d1a8f807d534260783d2a4a4360947c4c1cd74ef..ce507f92ac353fb50618a9a0f08f5f597da1c960 100644
--- a/components/web_view/public/interfaces/frame.mojom
+++ b/components/web_view/public/interfaces/frame.mojom
@@ -110,6 +110,12 @@ interface Frame {
 
   // Dispatches a load event to the parent of the frame.
   DispatchLoadEventToParent();
+
+  // 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);
 };
 
 enum ViewConnectType {
@@ -166,4 +172,10 @@ interface FrameClient {
   // Called to dispatch a load event of |frame_id| in its parent. This is only
   // called on the FrameClient rendering the parent of |frame_id|.
   OnDispatchFrameLoadEvent(uint32 frame_id);
+
+  // Finds a string in page.
+  OnFind(int32 request_id, string search_text);

[sky, 2015/09/28 23:18:59]

Since this and the next are meant to do something, nuke the On, e.g. Find and
StopFind. On the Frame side use the On, eg OnFind...

And document what request_id is.

+
+  // Stop highlighting the find results on the page.
+  OnStopFinding();
 };