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..e2616fa8b4ede0de1ac66a3c987b3d14fb48501f 100644
--- a/components/web_view/public/interfaces/frame.mojom
+++ b/components/web_view/public/interfaces/frame.mojom
@@ -110,6 +110,14 @@ interface Frame {
 
   // Dispatches a load event to the parent of the frame.
   DispatchLoadEventToParent();
+
+  // Reports the number of matches for a given find. This is an asynchronous
+  // notification can fire multiple times per ScopeStringMatches() call.
+  OnReportFindInFrameMatchCount(int32 request_id, int32 count,

[sky, 2015/10/05 15:55:08]

Same comment about names from web_view.mojom here.

+                                bool final_update);
+
+  // Reports which match is currently highlighted.
+  OnReportFindInPageSelection(int32 request_id, int32 active_match_ordinal);
 };
 
 enum ViewConnectType {
@@ -166,4 +174,29 @@ 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);
+
+  // TODO(erg): Several of these take a WebFindOptions struct; we probably need
+  // to build a Frame version of that struct.
+
+  // Searches for a given string synchronously. If a match is found, it will be

[sky, 2015/10/05 15:55:08]

The use of synchronous is confusing here given everything in async in mojo.

+  // selected. Find() will only return one match, and will do so synchronously.
+  // Returns true if the search string was found, false otherwise.
+  Find(int32 request_id, string search_text) => (bool found);
+
+  // Stop finding the single find result on the page. If |clear_selection| is
+  // set, it will also make the found text not selected.

[sky, 2015/10/05 15:55:08]

'make the found text not selected' -> clear the selected find text.

+  StopFinding(bool clear_selection);
+
+  // Match every instance of a string in a document asynchronously, highlighting
+  // them and putting a tick mark in the scroll bar. This differs from Find() as
+  // Find() is about finding the one selected instance of the text.
+  // ScopeStringMatches() is about highlighting all the instances of the text.
+  //
+  // ScopeStringMatches() will asynchronously call
+  // OnReportFindInFrameMatchCount() multiple times to report its progress.
+  ScopeStringMatches(int32 request_id, string search_test, bool reset);

[sky, 2015/10/05 15:55:08]

I would prefer you go with a name that doesn't assume knowledge of blink.
Something like FindAndSelectResults().

+
+  // Removes the tick marks and highlighting done by ScopeStringMatches() in
+  // this frame.
+  CancelPendingScopingEffort();
 };