Implement basic mojo Permission service and use it for Geolocation.

content/browser/geolocation/geolocation_dispatcher_host.cc

-// 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.
-
-#include "content/browser/geolocation/geolocation_dispatcher_host.h"
-
-#include <utility>
-
-#include "base/bind.h"
-#include "content/browser/frame_host/render_frame_host_impl.h"
-#include "content/browser/geolocation/geolocation_provider_impl.h"
-#include "content/browser/renderer_host/render_message_filter.h"
-#include "content/browser/web_contents/web_contents_impl.h"
-#include "content/public/browser/content_browser_client.h"
-#include "content/common/geolocation_messages.h"
-
-namespace content {
-
-GeolocationDispatcherHost::PendingPermission::PendingPermission(
-    int render_frame_id,
-    int render_process_id,
-    int bridge_id,
-    const GURL& origin)
-    : render_frame_id(render_frame_id),
-      render_process_id(render_process_id),
-      bridge_id(bridge_id),
-      origin(origin) {
-}
-
-GeolocationDispatcherHost::PendingPermission::~PendingPermission() {
-}
-
-GeolocationDispatcherHost::GeolocationDispatcherHost(
-    WebContents* web_contents)
-    : WebContentsObserver(web_contents),
-      weak_factory_(this) {
-  // This is initialized by WebContentsImpl. Do not add any non-trivial
-  // initialization here, defer to OnStartUpdating which is triggered whenever
-  // a javascript geolocation object is actually initialized.
-}
-
-GeolocationDispatcherHost::~GeolocationDispatcherHost() {
-}
-
-void GeolocationDispatcherHost::RenderFrameDeleted(
-    RenderFrameHost* render_frame_host) {
-  CancelPermissionRequestsForFrame(render_frame_host);
-}
-
-void GeolocationDispatcherHost::DidNavigateAnyFrame(
-    RenderFrameHost* render_frame_host,
-    const LoadCommittedDetails& details,
-    const FrameNavigateParams& params) {
-  if (details.is_in_page)
-    return;
-
-  CancelPermissionRequestsForFrame(render_frame_host);
-}
-
-bool GeolocationDispatcherHost::OnMessageReceived(
-    const IPC::Message& msg, RenderFrameHost* render_frame_host) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(GeolocationDispatcherHost, msg,
-                                   render_frame_host)
-    IPC_MESSAGE_HANDLER(GeolocationHostMsg_RequestPermission,
-                        OnRequestPermission)
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-void GeolocationDispatcherHost::OnRequestPermission(
-    RenderFrameHost* render_frame_host,
-    int bridge_id,
-    const GURL& requesting_origin,
-    bool user_gesture) {
-  int render_process_id = render_frame_host->GetProcess()->GetID();
-  int render_frame_id = render_frame_host->GetRoutingID();
-
-  PendingPermission pending_permission(
-      render_frame_id, render_process_id, bridge_id, requesting_origin);
-  pending_permissions_.push_back(pending_permission);
-
-  GetContentClient()->browser()->RequestPermission(
-      content::PERMISSION_GEOLOCATION,
-      web_contents(),
-      bridge_id,
-      requesting_origin,
-      user_gesture,
-      base::Bind(&GeolocationDispatcherHost::SendGeolocationPermissionResponse,
-                 weak_factory_.GetWeakPtr(),
-                 render_process_id,
-                 render_frame_id,
-                 bridge_id));
-}
-
-void GeolocationDispatcherHost::SendGeolocationPermissionResponse(
-    int render_process_id,
-    int render_frame_id,
-    int bridge_id,
-    bool allowed) {
-  for (size_t i = 0; i < pending_permissions_.size(); ++i) {
-    if (pending_permissions_[i].render_process_id == render_process_id &&
-        pending_permissions_[i].render_frame_id == render_frame_id &&
-        pending_permissions_[i].bridge_id == bridge_id) {
-      RenderFrameHost* render_frame_host =
-          RenderFrameHost::FromID(render_process_id, render_frame_id);
-      if (render_frame_host) {
-        render_frame_host->Send(new GeolocationMsg_PermissionSet(
-            render_frame_id, bridge_id, allowed));
-      }
-
-      if (allowed) {
-        GeolocationProviderImpl::GetInstance()->
-            UserDidOptIntoLocationServices();
-      }
-
-      pending_permissions_.erase(pending_permissions_.begin() + i);
-      return;
-    }
-  }
-
-  NOTREACHED();
-}
-
-void GeolocationDispatcherHost::CancelPermissionRequestsForFrame(
-    RenderFrameHost* render_frame_host) {
-  int render_process_id = render_frame_host->GetProcess()->GetID();
-  int render_frame_id = render_frame_host->GetRoutingID();
-
-  for (size_t i = 0; i < pending_permissions_.size(); ++i) {
-    if (pending_permissions_[i].render_process_id == render_process_id &&
-        pending_permissions_[i].render_frame_id == render_frame_id) {
-      GetContentClient()->browser()->CancelPermissionRequest(
-          content::PERMISSION_GEOLOCATION,
-          web_contents(),
-          pending_permissions_[i].bridge_id,
-          pending_permissions_[i].origin);
-      pending_permissions_.erase(pending_permissions_.begin() + i);
-    }
-  }
-}
-
-}  // namespace content