PlzNavigate: Get StreamPrivate API to work.

chrome/browser/extensions/api/streams_private/streams_private_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 21 matching lines @@
 
   explicit StreamsPrivateAPI(content::BrowserContext* context);
   ~StreamsPrivateAPI() override;
 
   // Send the onExecuteMimeTypeHandler event to |extension_id|.
   // |web_contents| is used to determine the tabId where the document is being
   // opened. The data for the document will be readable from |stream|, and
   // should be |expected_content_size| bytes long. If the viewer is being opened
   // in a BrowserPlugin, specify a non-empty |view_id| of the plugin. |embedded|
   // should be set to whether the document is embedded within another document.
+  // The |frame_tree_node_id| parameter is used for PlzNavigate for the top
+  // level plugins case. (PDF, etc). If this parameter has a valid value then
+  // it overrides the |render_process_id| and |render_frame_id| parameters.
+  // The |render_process_id| is the id of the renderer process.
+  // The |render_frame_id| is the routing id of the RenderFrameHost.
   void ExecuteMimeTypeHandler(const std::string& extension_id,
                               content::WebContents* web_contents,
                               std::unique_ptr<content::StreamInfo> stream,
                               const std::string& view_id,
                               int64_t expected_content_size,
                               bool embedded,
+                              int frame_tree_node_id,
                               int render_process_id,
                               int render_frame_id);
 
   void AbortStream(const std::string& extension_id,
                    const GURL& stream_url,
                    const base::Closure& callback);
 
   // BrowserContextKeyedAPI implementation.
   static BrowserContextKeyedAPIFactory<StreamsPrivateAPI>* GetFactoryInstance();
 
@@ skipping 39 matching lines @@
 
  private:
   void OnClose();
 
   std::string stream_url_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_STREAMS_PRIVATE_STREAMS_PRIVATE_API_H_