browser: implement multiple permission requesting

chrome/browser/permissions/permission_request_id.cc

 // Copyright 2015 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.
 
 #include "chrome/browser/permissions/permission_request_id.h"
 
 #include "base/strings/stringprintf.h"
+#include "content/public/browser/render_frame_host.h"
+#include "content/public/browser/render_process_host.h"
+
+PermissionRequestID::PermissionRequestID(
+    content::RenderFrameHost* render_frame_host,
+    int request_id)
+    : render_process_id_(render_frame_host->GetProcess()->GetID()),
+      render_frame_id_(render_frame_host->GetRoutingID()),
+      request_id_(request_id) {
+}
 
 PermissionRequestID::PermissionRequestID(int render_process_id,
                                          int render_frame_id,
                                          int request_id)
     : render_process_id_(render_process_id),
       render_frame_id_(render_frame_id),
       request_id_(request_id) {
 }
 
 PermissionRequestID::~PermissionRequestID() {
 }
 
 bool PermissionRequestID::operator==(const PermissionRequestID& other) const {
   return render_process_id_ == other.render_process_id_ &&
          render_frame_id_ == other.render_frame_id_ &&
          request_id_ == other.request_id_;
 }
 
 bool PermissionRequestID::operator!=(const PermissionRequestID& other) const {
   return !operator==(other);
 }
 
 std::string PermissionRequestID::ToString() const {
   return base::StringPrintf("%d,%d,%d",
                             render_process_id_,
                             render_frame_id_,
                             request_id_);
 }