Implement find in page support for top level BrowserPlugins.

content/public/browser/browser_plugin_guest_delegate.h

Index: content/public/browser/browser_plugin_guest_delegate.h
diff --git a/content/public/browser/browser_plugin_guest_delegate.h b/content/public/browser/browser_plugin_guest_delegate.h
index 21e115a203044853e87ac3bc540c1544361ed191..90abc5ddfdaabaf298217e16ec78c5e61117f60b 100644
--- a/content/public/browser/browser_plugin_guest_delegate.h
+++ b/content/public/browser/browser_plugin_guest_delegate.h
@@ -62,6 +62,13 @@ class CONTENT_EXPORT BrowserPluginGuestDelegate {
   typedef base::Callback<void()> DestructionCallback;
   virtual void RegisterDestructionCallback(
       const DestructionCallback& callback) {}
+
+  // Find the given |search_text| in the page. Returns true if the find request
+  // is handled by this browser plugin guest delegate.
+  virtual bool Find(int request_id,
+                    const base::string16& search_text,
+                    const blink::WebFindOptions& options,
+                    bool is_full_page_plugin);
 };
 
 }  // namespace content