PlzNavigate: send searchable form data to the browser side on form submission.

content/browser/frame_host/navigation_handle_impl.h

Index: content/browser/frame_host/navigation_handle_impl.h
diff --git a/content/browser/frame_host/navigation_handle_impl.h b/content/browser/frame_host/navigation_handle_impl.h
index 2d1f0098ca30ade1d0f16d0de747c202f5cf1abd..3eeed430174884bb1da488b9bfb8d4be41348b96 100644
--- a/content/browser/frame_host/navigation_handle_impl.h
+++ b/content/browser/frame_host/navigation_handle_impl.h
@@ -128,6 +128,8 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
       const std::string& raw_response_header) override;
   void CallDidCommitNavigationForTesting(const GURL& url) override;
   bool WasStartedFromContextMenu() const override;
+  const GURL& GetSearchableFormURL() override;
+  const std::string& GetSearchableFormEncoding() override;
 
   NavigationData* GetNavigationData() override;
 
@@ -281,6 +283,11 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
     return navigation_ui_data_.get();
   }
 
+  void set_searchable_form_url(const GURL& url) { searchable_form_url_ = url; }
+  void set_searchable_form_encoding(const std::string& encoding) {
+    searchable_form_encoding_ = encoding;
+  }
+
  private:
   friend class NavigationHandleImplTest;
 
@@ -424,6 +431,9 @@ class CONTENT_EXPORT NavigationHandleImpl : public NavigationHandle {
   // False by default unless the navigation started within a context menu.
   bool started_from_context_menu_;
 
+  GURL searchable_form_url_;
+  std::string searchable_form_encoding_;
+
   base::WeakPtrFactory<NavigationHandleImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationHandleImpl);