path: root/content/browser/frame_host/render_frame_host_impl.cc

// Copyright 2013 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/frame_host/render_frame_host_impl.h"

#include "base/bind.h"
#include "base/command_line.h"
#include "base/containers/hash_tables.h"
#include "base/lazy_instance.h"
#include "base/metrics/histogram.h"
#include "base/metrics/user_metrics_action.h"
#include "base/time/time.h"
#include "content/browser/accessibility/accessibility_mode_helper.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
#include "content/browser/accessibility/browser_accessibility_state_impl.h"
#include "content/browser/child_process_security_policy_impl.h"
#include "content/browser/frame_host/cross_process_frame_connector.h"
#include "content/browser/frame_host/cross_site_transferring_request.h"
#include "content/browser/frame_host/frame_accessibility.h"
#include "content/browser/frame_host/frame_tree.h"
#include "content/browser/frame_host/frame_tree_node.h"
#include "content/browser/frame_host/navigator.h"
#include "content/browser/frame_host/render_frame_host_delegate.h"
#include "content/browser/frame_host/render_frame_proxy_host.h"
#include "content/browser/frame_host/render_widget_host_view_child_frame.h"
#include "content/browser/renderer_host/input/input_router.h"
#include "content/browser/renderer_host/input/timeout_monitor.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/browser/renderer_host/render_view_host_delegate.h"
#include "content/browser/renderer_host/render_view_host_delegate_view.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/browser/renderer_host/render_widget_host_view_base.h"
#include "content/browser/transition_request_manager.h"
#include "content/common/accessibility_messages.h"
#include "content/common/desktop_notification_messages.h"
#include "content/common/frame_messages.h"
#include "content/common/input_messages.h"
#include "content/common/inter_process_time_ticks_converter.h"
#include "content/common/navigation_params.h"
#include "content/common/platform_notification_messages.h"
#include "content/common/render_frame_setup.mojom.h"
#include "content/common/swapped_out_messages.h"
#include "content/public/browser/ax_event_notification_details.h"
#include "content/public/browser/browser_accessibility_state.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_plugin_guest_manager.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/desktop_notification_delegate.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/stream_handle.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/url_constants.h"
#include "content/public/common/url_utils.h"
#include "ui/accessibility/ax_tree.h"
#include "url/gurl.h"

#if defined(OS_MACOSX)
#include "content/browser/frame_host/popup_menu_helper_mac.h"
#endif

using base::TimeDelta;

namespace content {

namespace {

// The (process id, routing id) pair that identifies one RenderFrame.
typedef std::pair<int32, int32> RenderFrameHostID;
typedef base::hash_map<RenderFrameHostID, RenderFrameHostImpl*>
    RoutingIDFrameMap;
base::LazyInstance<RoutingIDFrameMap> g_routing_id_frame_map =
    LAZY_INSTANCE_INITIALIZER;

class DesktopNotificationDelegateImpl : public DesktopNotificationDelegate {
 public:
  DesktopNotificationDelegateImpl(RenderFrameHost* render_frame_host,
                                  int notification_id)
      : render_process_id_(render_frame_host->GetProcess()->GetID()),
        render_frame_id_(render_frame_host->GetRoutingID()),
        notification_id_(notification_id) {}

  virtual ~DesktopNotificationDelegateImpl() {}

  virtual void NotificationDisplayed() override {
    RenderFrameHost* rfh =
        RenderFrameHost::FromID(render_process_id_, render_frame_id_);
    if (!rfh)
      return;

    rfh->Send(new DesktopNotificationMsg_PostDisplay(
        rfh->GetRoutingID(), notification_id_));
  }

  virtual void NotificationError() override {
    RenderFrameHost* rfh =
        RenderFrameHost::FromID(render_process_id_, render_frame_id_);
    if (!rfh)
      return;

    rfh->Send(new DesktopNotificationMsg_PostError(
        rfh->GetRoutingID(), notification_id_));
  }

  virtual void NotificationClosed(bool by_user) override {
    RenderFrameHost* rfh =
        RenderFrameHost::FromID(render_process_id_, render_frame_id_);
    if (!rfh)
      return;

    rfh->Send(new DesktopNotificationMsg_PostClose(
        rfh->GetRoutingID(), notification_id_, by_user));
    static_cast<RenderFrameHostImpl*>(rfh)->NotificationClosed(
        notification_id_);
  }

  virtual void NotificationClick() override {
    RenderFrameHost* rfh =
        RenderFrameHost::FromID(render_process_id_, render_frame_id_);
    if (!rfh)
      return;

    rfh->Send(new DesktopNotificationMsg_PostClick(
        rfh->GetRoutingID(), notification_id_));
  }

 private:
  int render_process_id_;
  int render_frame_id_;
  int notification_id_;
};

// Translate a WebKit text direction into a base::i18n one.
base::i18n::TextDirection WebTextDirectionToChromeTextDirection(
    blink::WebTextDirection dir) {
  switch (dir) {
    case blink::WebTextDirectionLeftToRight:
      return base::i18n::LEFT_TO_RIGHT;
    case blink::WebTextDirectionRightToLeft:
      return base::i18n::RIGHT_TO_LEFT;
    default:
      NOTREACHED();
      return base::i18n::UNKNOWN_DIRECTION;
  }
}

}  // namespace

// static
bool RenderFrameHostImpl::IsRFHStateActive(RenderFrameHostImplState rfh_state) {
  return rfh_state == STATE_DEFAULT;
}

// static
RenderFrameHost* RenderFrameHost::FromID(int render_process_id,
                                         int render_frame_id) {
  return RenderFrameHostImpl::FromID(render_process_id, render_frame_id);
}

// static
RenderFrameHostImpl* RenderFrameHostImpl::FromID(int process_id,
                                                 int routing_id) {
  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
  RoutingIDFrameMap* frames = g_routing_id_frame_map.Pointer();
  RoutingIDFrameMap::iterator it = frames->find(
      RenderFrameHostID(process_id, routing_id));
  return it == frames->end() ? NULL : it->second;
}

RenderFrameHostImpl::RenderFrameHostImpl(RenderViewHostImpl* render_view_host,
                                         RenderFrameHostDelegate* delegate,
                                         FrameTree* frame_tree,
                                         FrameTreeNode* frame_tree_node,
                                         int routing_id,
                                         bool is_swapped_out)
    : render_view_host_(render_view_host),
      delegate_(delegate),
      cross_process_frame_connector_(NULL),
      render_frame_proxy_host_(NULL),
      frame_tree_(frame_tree),
      frame_tree_node_(frame_tree_node),
      routing_id_(routing_id),
      render_frame_created_(false),
      navigations_suspended_(false),
      is_waiting_for_beforeunload_ack_(false),
      unload_ack_is_for_cross_site_transition_(false),
      weak_ptr_factory_(this) {
  frame_tree_->RegisterRenderFrameHost(this);
  GetProcess()->AddRoute(routing_id_, this);
  g_routing_id_frame_map.Get().insert(std::make_pair(
      RenderFrameHostID(GetProcess()->GetID(), routing_id_),
      this));

  if (is_swapped_out) {
    rfh_state_ = STATE_SWAPPED_OUT;
  } else {
    rfh_state_ = STATE_DEFAULT;
    GetSiteInstance()->increment_active_frame_count();
  }

  if (GetProcess()->GetServiceRegistry()) {
    RenderFrameSetupPtr setup;
    GetProcess()->GetServiceRegistry()->ConnectToRemoteService(&setup);
    mojo::ServiceProviderPtr service_provider;
    setup->GetServiceProviderForFrame(routing_id_,
                                      mojo::GetProxy(&service_provider));
    service_registry_.BindRemoteServiceProvider(
        service_provider.PassMessagePipe());

#if defined(OS_ANDROID)
    service_registry_android_.reset(
        new ServiceRegistryAndroid(&service_registry_));
#endif
  }

  swapout_event_monitor_timeout_.reset(new TimeoutMonitor(base::Bind(
      &RenderFrameHostImpl::OnSwappedOut, weak_ptr_factory_.GetWeakPtr())));
}

RenderFrameHostImpl::~RenderFrameHostImpl() {
  GetProcess()->RemoveRoute(routing_id_);
  g_routing_id_frame_map.Get().erase(
      RenderFrameHostID(GetProcess()->GetID(), routing_id_));

  if (delegate_)
    delegate_->RenderFrameDeleted(this);

  FrameAccessibility::GetInstance()->OnRenderFrameHostDestroyed(this);

  // If this was swapped out, it already decremented the active frame count of
  // the SiteInstance it belongs to.
  if (IsRFHStateActive(rfh_state_))
    GetSiteInstance()->decrement_active_frame_count();

  // Notify the FrameTree that this RFH is going away, allowing it to shut down
  // the corresponding RenderViewHost if it is no longer needed.
  frame_tree_->UnregisterRenderFrameHost(this);
}

int RenderFrameHostImpl::GetRoutingID() {
  return routing_id_;
}

SiteInstanceImpl* RenderFrameHostImpl::GetSiteInstance() {
  return render_view_host_->GetSiteInstance();
}

RenderProcessHost* RenderFrameHostImpl::GetProcess() {
  // TODO(nasko): This should return its own process, once we have working
  // cross-process navigation for subframes.
  return render_view_host_->GetProcess();
}

RenderFrameHost* RenderFrameHostImpl::GetParent() {
  FrameTreeNode* parent_node = frame_tree_node_->parent();
  if (!parent_node)
    return NULL;
  return parent_node->current_frame_host();
}

const std::string& RenderFrameHostImpl::GetFrameName() {
  return frame_tree_node_->frame_name();
}

bool RenderFrameHostImpl::IsCrossProcessSubframe() {
  FrameTreeNode* parent_node = frame_tree_node_->parent();
  if (!parent_node)
    return false;
  return GetSiteInstance() !=
      parent_node->current_frame_host()->GetSiteInstance();
}

GURL RenderFrameHostImpl::GetLastCommittedURL() {
  return frame_tree_node_->current_url();
}

gfx::NativeView RenderFrameHostImpl::GetNativeView() {
  RenderWidgetHostView* view = render_view_host_->GetView();
  if (!view)
    return NULL;
  return view->GetNativeView();
}

void RenderFrameHostImpl::ExecuteJavaScript(
    const base::string16& javascript) {
  Send(new FrameMsg_JavaScriptExecuteRequest(routing_id_,
                                             javascript,
                                             0, false));
}

void RenderFrameHostImpl::ExecuteJavaScript(
     const base::string16& javascript,
     const JavaScriptResultCallback& callback) {
  static int next_id = 1;
  int key = next_id++;
  Send(new FrameMsg_JavaScriptExecuteRequest(routing_id_,
                                             javascript,
                                             key, true));
  javascript_callbacks_.insert(std::make_pair(key, callback));
}

void RenderFrameHostImpl::ExecuteJavaScriptForTests(
    const base::string16& javascript) {
  Send(new FrameMsg_JavaScriptExecuteRequestForTests(routing_id_,
                                                     javascript,
                                                     0, false));
}

RenderViewHost* RenderFrameHostImpl::GetRenderViewHost() {
  return render_view_host_;
}

ServiceRegistry* RenderFrameHostImpl::GetServiceRegistry() {
  return &service_registry_;
}

bool RenderFrameHostImpl::Send(IPC::Message* message) {
  if (IPC_MESSAGE_ID_CLASS(message->type()) == InputMsgStart) {
    return render_view_host_->input_router()->SendInput(
        make_scoped_ptr(message));
  }

  // Route IPCs through the RenderFrameProxyHost when in swapped out state.
  // Note: For subframes in --site-per-process mode, we don't use swapped out
  // RenderFrameHosts.
  if (frame_tree_node_->IsMainFrame() && is_swapped_out()) {
    DCHECK(render_frame_proxy_host_);
    return render_frame_proxy_host_->Send(message);
  }

  return GetProcess()->Send(message);
}

bool RenderFrameHostImpl::OnMessageReceived(const IPC::Message &msg) {
  // Filter out most IPC messages if this frame is swapped out.
  // We still want to handle certain ACKs to keep our state consistent.
  if (is_swapped_out()) {
    if (!SwappedOutMessages::CanHandleWhileSwappedOut(msg)) {
      // If this is a synchronous message and we decided not to handle it,
      // we must send an error reply, or else the renderer will be stuck
      // and won't respond to future requests.
      if (msg.is_sync()) {
        IPC::Message* reply = IPC::SyncMessage::GenerateReply(&msg);
        reply->set_reply_error();
        Send(reply);
      }
      // Don't continue looking for someone to handle it.
      return true;
    }
  }

  if (delegate_->OnMessageReceived(this, msg))
    return true;

  RenderFrameProxyHost* proxy =
      frame_tree_node_->render_manager()->GetProxyToParent();
  if (proxy && proxy->cross_process_frame_connector() &&
      proxy->cross_process_frame_connector()->OnMessageReceived(msg))
    return true;

  bool handled = true;
  IPC_BEGIN_MESSAGE_MAP(RenderFrameHostImpl, msg)
    IPC_MESSAGE_HANDLER(FrameHostMsg_AddMessageToConsole, OnAddMessageToConsole)
    IPC_MESSAGE_HANDLER(FrameHostMsg_Detach, OnDetach)
    IPC_MESSAGE_HANDLER(FrameHostMsg_FrameFocused, OnFrameFocused)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidStartProvisionalLoadForFrame,
                        OnDidStartProvisionalLoadForFrame)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidFailProvisionalLoadWithError,
                        OnDidFailProvisionalLoadWithError)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidFailLoadWithError,
                        OnDidFailLoadWithError)
    IPC_MESSAGE_HANDLER_GENERIC(FrameHostMsg_DidCommitProvisionalLoad,
                                OnDidCommitProvisionalLoad(msg))
    IPC_MESSAGE_HANDLER(FrameHostMsg_OpenURL, OnOpenURL)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DocumentOnLoadCompleted,
                        OnDocumentOnLoadCompleted)
    IPC_MESSAGE_HANDLER(FrameHostMsg_BeforeUnload_ACK, OnBeforeUnloadACK)
    IPC_MESSAGE_HANDLER(FrameHostMsg_SwapOut_ACK, OnSwapOutACK)
    IPC_MESSAGE_HANDLER(FrameHostMsg_ContextMenu, OnContextMenu)
    IPC_MESSAGE_HANDLER(FrameHostMsg_JavaScriptExecuteResponse,
                        OnJavaScriptExecuteResponse)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(FrameHostMsg_RunJavaScriptMessage,
                                    OnRunJavaScriptMessage)
    IPC_MESSAGE_HANDLER_DELAY_REPLY(FrameHostMsg_RunBeforeUnloadConfirm,
                                    OnRunBeforeUnloadConfirm)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidAccessInitialDocument,
                        OnDidAccessInitialDocument)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidDisownOpener, OnDidDisownOpener)
    IPC_MESSAGE_HANDLER(FrameHostMsg_DidAssignPageId, OnDidAssignPageId)
    IPC_MESSAGE_HANDLER(FrameHostMsg_UpdateTitle, OnUpdateTitle)
    IPC_MESSAGE_HANDLER(FrameHostMsg_UpdateEncoding, OnUpdateEncoding)
    IPC_MESSAGE_HANDLER(FrameHostMsg_BeginNavigation,
                        OnBeginNavigation)
    IPC_MESSAGE_HANDLER(PlatformNotificationHostMsg_RequestPermission,
                        OnRequestPlatformNotificationPermission)
    IPC_MESSAGE_HANDLER(DesktopNotificationHostMsg_Show,
                        OnShowDesktopNotification)
    IPC_MESSAGE_HANDLER(DesktopNotificationHostMsg_Cancel,
                        OnCancelDesktopNotification)
    IPC_MESSAGE_HANDLER(FrameHostMsg_TextSurroundingSelectionResponse,
                        OnTextSurroundingSelectionResponse)
    IPC_MESSAGE_HANDLER(AccessibilityHostMsg_Events, OnAccessibilityEvents)
    IPC_MESSAGE_HANDLER(AccessibilityHostMsg_LocationChanges,
                        OnAccessibilityLocationChanges)
#if defined(OS_MACOSX) || defined(OS_ANDROID)
    IPC_MESSAGE_HANDLER(FrameHostMsg_ShowPopup, OnShowPopup)
    IPC_MESSAGE_HANDLER(FrameHostMsg_HidePopup, OnHidePopup)
#endif
  IPC_END_MESSAGE_MAP()

  // No further actions here, since we may have been deleted.
  return handled;
}

void RenderFrameHostImpl::AccessibilitySetFocus(int object_id) {
  Send(new AccessibilityMsg_SetFocus(routing_id_, object_id));
}

void RenderFrameHostImpl::AccessibilityDoDefaultAction(int object_id) {
  Send(new AccessibilityMsg_DoDefaultAction(routing_id_, object_id));
}

void RenderFrameHostImpl::AccessibilityShowMenu(
    const gfx::Point& global_point) {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view)
    view->AccessibilityShowMenu(global_point);
}

void RenderFrameHostImpl::AccessibilityScrollToMakeVisible(
    int acc_obj_id, const gfx::Rect& subfocus) {
  Send(new AccessibilityMsg_ScrollToMakeVisible(
      routing_id_, acc_obj_id, subfocus));
}

void RenderFrameHostImpl::AccessibilityScrollToPoint(
    int acc_obj_id, const gfx::Point& point) {
  Send(new AccessibilityMsg_ScrollToPoint(
      routing_id_, acc_obj_id, point));
}

void RenderFrameHostImpl::AccessibilitySetTextSelection(
    int object_id, int start_offset, int end_offset) {
  Send(new AccessibilityMsg_SetTextSelection(
      routing_id_, object_id, start_offset, end_offset));
}

bool RenderFrameHostImpl::AccessibilityViewHasFocus() const {
  RenderWidgetHostView* view = render_view_host_->GetView();
  if (view)
    return view->HasFocus();
  return false;
}

gfx::Rect RenderFrameHostImpl::AccessibilityGetViewBounds() const {
  RenderWidgetHostView* view = render_view_host_->GetView();
  if (view)
    return view->GetViewBounds();
  return gfx::Rect();
}

gfx::Point RenderFrameHostImpl::AccessibilityOriginInScreen(
    const gfx::Rect& bounds) const {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view)
    return view->AccessibilityOriginInScreen(bounds);
  return gfx::Point();
}

void RenderFrameHostImpl::AccessibilityHitTest(const gfx::Point& point) {
  Send(new AccessibilityMsg_HitTest(routing_id_, point));
}

void RenderFrameHostImpl::AccessibilityFatalError() {
  Send(new AccessibilityMsg_FatalError(routing_id_));
  browser_accessibility_manager_.reset(NULL);
}

gfx::AcceleratedWidget
    RenderFrameHostImpl::AccessibilityGetAcceleratedWidget() {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view)
    return view->AccessibilityGetAcceleratedWidget();
  return gfx::kNullAcceleratedWidget;
}

gfx::NativeViewAccessible
    RenderFrameHostImpl::AccessibilityGetNativeViewAccessible() {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view)
    return view->AccessibilityGetNativeViewAccessible();
  return NULL;
}

BrowserAccessibilityManager* RenderFrameHostImpl::AccessibilityGetChildFrame(
    int accessibility_node_id) {
  RenderFrameHostImpl* child_frame =
      FrameAccessibility::GetInstance()->GetChild(this, accessibility_node_id);
  if (!child_frame)
    return NULL;

  // Return NULL if this isn't an out-of-process iframe. Same-process iframes
  // are already part of the accessibility tree.
  if (child_frame->GetProcess()->GetID() == GetProcess()->GetID())
    return NULL;

  // As a sanity check, make sure the frame we're going to return belongs
  // to the same BrowserContext.
  if (GetSiteInstance()->GetBrowserContext() !=
      child_frame->GetSiteInstance()->GetBrowserContext()) {
    NOTREACHED();
    return NULL;
  }

  return child_frame->GetOrCreateBrowserAccessibilityManager();
}

BrowserAccessibility* RenderFrameHostImpl::AccessibilityGetParentFrame() {
  RenderFrameHostImpl* parent_frame = NULL;
  int parent_node_id = 0;
  if (!FrameAccessibility::GetInstance()->GetParent(
      this, &parent_frame, &parent_node_id)) {
    return NULL;
  }

  // As a sanity check, make sure the frame we're going to return belongs
  // to the same BrowserContext.
  if (GetSiteInstance()->GetBrowserContext() !=
      parent_frame->GetSiteInstance()->GetBrowserContext()) {
    NOTREACHED();
    return NULL;
  }

  BrowserAccessibilityManager* manager =
      parent_frame->browser_accessibility_manager();
  if (!manager)
    return NULL;

  return manager->GetFromID(parent_node_id);
}

bool RenderFrameHostImpl::CreateRenderFrame(int parent_routing_id) {
  TRACE_EVENT0("navigation", "RenderFrameHostImpl::CreateRenderFrame");
  DCHECK(!IsRenderFrameLive()) << "Creating frame twice";

  // The process may (if we're sharing a process with another host that already
  // initialized it) or may not (we have our own process or the old process
  // crashed) have been initialized. Calling Init multiple times will be
  // ignored, so this is safe.
  if (!GetProcess()->Init())
    return false;

  DCHECK(GetProcess()->HasConnection());

  Send(new FrameMsg_NewFrame(routing_id_, parent_routing_id));

  // The renderer now has a RenderFrame for this RenderFrameHost.  Note that
  // this path is only used for out-of-process iframes.  Main frame RenderFrames
  // are created with their RenderView, and same-site iframes are created at the
  // time of OnCreateChildFrame.
  set_render_frame_created(true);

  return true;
}

bool RenderFrameHostImpl::IsRenderFrameLive() {
  // RenderFrames are created for main frames at the same time as RenderViews,
  // so we rely on IsRenderViewLive.  For subframes, we keep track of each
  // RenderFrame individually with render_frame_created_.
  bool is_live = !GetParent() ?
      render_view_host_->IsRenderViewLive() :
      GetProcess()->HasConnection() && render_frame_created_;

  // Sanity check: the RenderView should always be live if the RenderFrame is.
  DCHECK(!is_live || render_view_host_->IsRenderViewLive());

  return is_live;
}

void RenderFrameHostImpl::Init() {
  GetProcess()->ResumeRequestsForView(routing_id_);
}

void RenderFrameHostImpl::OnAddMessageToConsole(
    int32 level,
    const base::string16& message,
    int32 line_no,
    const base::string16& source_id) {
  if (delegate_->AddMessageToConsole(level, message, line_no, source_id))
    return;

  // Pass through log level only on WebUI pages to limit console spew.
  int32 resolved_level =
      HasWebUIScheme(delegate_->GetMainFrameLastCommittedURL()) ? level : 0;

  if (resolved_level >= ::logging::GetMinLogLevel()) {
    logging::LogMessage("CONSOLE", line_no, resolved_level).stream() << "\"" <<
        message << "\", source: " << source_id << " (" << line_no << ")";
  }
}

void RenderFrameHostImpl::OnCreateChildFrame(int new_routing_id,
                                             const std::string& frame_name) {
  // It is possible that while a new RenderFrameHost was committed, the
  // RenderFrame corresponding to this host sent an IPC message to create a
  // frame and it is delivered after this host is swapped out.
  // Ignore such messages, as we know this RenderFrameHost is going away.
  if (rfh_state_ != RenderFrameHostImpl::STATE_DEFAULT)
    return;

  RenderFrameHostImpl* new_frame = frame_tree_->AddFrame(
      frame_tree_node_, GetProcess()->GetID(), new_routing_id, frame_name);
  if (!new_frame)
    return;

  // We know that the RenderFrame has been created in this case, immediately
  // after the CreateChildFrame IPC was sent.
  new_frame->set_render_frame_created(true);

  if (delegate_)
    delegate_->RenderFrameCreated(new_frame);
}

void RenderFrameHostImpl::OnDetach() {
  frame_tree_->RemoveFrame(frame_tree_node_);
}

void RenderFrameHostImpl::OnFrameFocused() {
  frame_tree_->SetFocusedFrame(frame_tree_node_);
}

void RenderFrameHostImpl::OnOpenURL(
    const FrameHostMsg_OpenURL_Params& params) {
  GURL validated_url(params.url);
  GetProcess()->FilterURL(false, &validated_url);

  TRACE_EVENT1("navigation", "RenderFrameHostImpl::OnOpenURL",
               "url", validated_url.possibly_invalid_spec());
  frame_tree_node_->navigator()->RequestOpenURL(
      this, validated_url, params.referrer, params.disposition,
      params.should_replace_current_entry, params.user_gesture);
}

void RenderFrameHostImpl::OnDocumentOnLoadCompleted() {
  // This message is only sent for top-level frames. TODO(avi): when frame tree
  // mirroring works correctly, add a check here to enforce it.
  delegate_->DocumentOnLoadCompleted(this);
}

void RenderFrameHostImpl::OnDidStartProvisionalLoadForFrame(
    const GURL& url,
    bool is_transition_navigation) {
  frame_tree_node_->navigator()->DidStartProvisionalLoad(
      this, url, is_transition_navigation);
}

void RenderFrameHostImpl::OnDidFailProvisionalLoadWithError(
    const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params) {
  frame_tree_node_->navigator()->DidFailProvisionalLoadWithError(this, params);
}

void RenderFrameHostImpl::OnDidFailLoadWithError(
    const GURL& url,
    int error_code,
    const base::string16& error_description) {
  GURL validated_url(url);
  GetProcess()->FilterURL(false, &validated_url);

  frame_tree_node_->navigator()->DidFailLoadWithError(
      this, validated_url, error_code, error_description);
}

// Called when the renderer navigates.  For every frame loaded, we'll get this
// notification containing parameters identifying the navigation.
//
// Subframes are identified by the page transition type.  For subframes loaded
// as part of a wider page load, the page_id will be the same as for the top
// level frame.  If the user explicitly requests a subframe navigation, we will
// get a new page_id because we need to create a new navigation entry for that
// action.
void RenderFrameHostImpl::OnDidCommitProvisionalLoad(const IPC::Message& msg) {
  // Read the parameters out of the IPC message directly to avoid making another
  // copy when we filter the URLs.
  PickleIterator iter(msg);
  FrameHostMsg_DidCommitProvisionalLoad_Params validated_params;
  if (!IPC::ParamTraits<FrameHostMsg_DidCommitProvisionalLoad_Params>::
      Read(&msg, &iter, &validated_params))
    return;
  TRACE_EVENT1("navigation", "RenderFrameHostImpl::OnDidCommitProvisionalLoad",
               "url", validated_params.url.possibly_invalid_spec());

  // If we're waiting for a cross-site beforeunload ack from this renderer and
  // we receive a Navigate message from the main frame, then the renderer was
  // navigating already and sent it before hearing the FrameMsg_Stop message.
  // We do not want to cancel the pending navigation in this case, since the
  // old page will soon be stopped.  Instead, treat this as a beforeunload ack
  // to allow the pending navigation to continue.
  if (is_waiting_for_beforeunload_ack_ &&
      unload_ack_is_for_cross_site_transition_ &&
      ui::PageTransitionIsMainFrame(validated_params.transition)) {
    OnBeforeUnloadACK(true, send_before_unload_start_time_,
                      base::TimeTicks::Now());
    return;
  }

  // If we're waiting for an unload ack from this renderer and we receive a
  // Navigate message, then the renderer was navigating before it received the
  // unload request.  It will either respond to the unload request soon or our
  // timer will expire.  Either way, we should ignore this message, because we
  // have already committed to closing this renderer.
  if (IsWaitingForUnloadACK())
    return;

  RenderProcessHost* process = GetProcess();

  // Attempts to commit certain off-limits URL should be caught more strictly
  // than our FilterURL checks below.  If a renderer violates this policy, it
  // should be killed.
  if (!CanCommitURL(validated_params.url)) {
    VLOG(1) << "Blocked URL " << validated_params.url.spec();
    validated_params.url = GURL(url::kAboutBlankURL);
    RecordAction(base::UserMetricsAction("CanCommitURL_BlockedAndKilled"));
    // Kills the process.
    process->ReceivedBadMessage();
  }

  // Without this check, an evil renderer can trick the browser into creating
  // a navigation entry for a banned URL.  If the user clicks the back button
  // followed by the forward button (or clicks reload, or round-trips through
  // session restore, etc), we'll think that the browser commanded the
  // renderer to load the URL and grant the renderer the privileges to request
  // the URL.  To prevent this attack, we block the renderer from inserting
  // banned URLs into the navigation controller in the first place.
  process->FilterURL(false, &validated_params.url);
  process->FilterURL(true, &validated_params.referrer.url);
  for (std::vector<GURL>::iterator it(validated_params.redirects.begin());
      it != validated_params.redirects.end(); ++it) {
    process->FilterURL(false, &(*it));
  }
  process->FilterURL(true, &validated_params.searchable_form_url);

  // Without this check, the renderer can trick the browser into using
  // filenames it can't access in a future session restore.
  if (!render_view_host_->CanAccessFilesOfPageState(
          validated_params.page_state)) {
    GetProcess()->ReceivedBadMessage();
    return;
  }

  frame_tree_node()->navigator()->DidNavigate(this, validated_params);
}

RenderWidgetHostImpl* RenderFrameHostImpl::GetRenderWidgetHost() {
  return static_cast<RenderWidgetHostImpl*>(render_view_host_);
}

int RenderFrameHostImpl::GetEnabledBindings() {
  return render_view_host_->GetEnabledBindings();
}

void RenderFrameHostImpl::OnCrossSiteResponse(
    const GlobalRequestID& global_request_id,
    scoped_ptr<CrossSiteTransferringRequest> cross_site_transferring_request,
    const std::vector<GURL>& transfer_url_chain,
    const Referrer& referrer,
    ui::PageTransition page_transition,
    bool should_replace_current_entry) {
  frame_tree_node_->render_manager()->OnCrossSiteResponse(
      this, global_request_id, cross_site_transferring_request.Pass(),
      transfer_url_chain, referrer, page_transition,
      should_replace_current_entry);
}

void RenderFrameHostImpl::OnDeferredAfterResponseStarted(
    const GlobalRequestID& global_request_id,
    const TransitionLayerData& transition_data) {
  frame_tree_node_->render_manager()->OnDeferredAfterResponseStarted(
      global_request_id, this);

  if (GetParent() || !delegate_->WillHandleDeferAfterResponseStarted())
    frame_tree_node_->render_manager()->ResumeResponseDeferredAtStart();
  else
    delegate_->DidDeferAfterResponseStarted(transition_data);
}

void RenderFrameHostImpl::SwapOut(RenderFrameProxyHost* proxy) {
  // The end of this event is in OnSwapOutACK when the RenderFrame has completed
  // the operation and sends back an IPC message.
  // The trace event may not end properly if the ACK times out.  We expect this
  // to be fixed when RenderViewHostImpl::OnSwapOut moves to RenderFrameHost.
  TRACE_EVENT_ASYNC_BEGIN0("navigation", "RenderFrameHostImpl::SwapOut", this);

  // If this RenderFrameHost is not in the default state, it must have already
  // gone through this, therefore just return.
  if (rfh_state_ != RenderFrameHostImpl::STATE_DEFAULT) {
    NOTREACHED() << "RFH should be in default state when calling SwapOut.";
    return;
  }

  SetState(RenderFrameHostImpl::STATE_PENDING_SWAP_OUT);
  swapout_event_monitor_timeout_->Start(
      base::TimeDelta::FromMilliseconds(RenderViewHostImpl::kUnloadTimeoutMS));

  // There may be no proxy if there are no active views in the process.
  int proxy_routing_id = MSG_ROUTING_NONE;
  if (proxy) {
    set_render_frame_proxy_host(proxy);
    proxy_routing_id = proxy->GetRoutingID();
  }

  if (IsRenderFrameLive())
    Send(new FrameMsg_SwapOut(routing_id_, proxy_routing_id));

  if (!GetParent())
    delegate_->SwappedOut(this);
}

void RenderFrameHostImpl::OnBeforeUnloadACK(
    bool proceed,
    const base::TimeTicks& renderer_before_unload_start_time,
    const base::TimeTicks& renderer_before_unload_end_time) {
  TRACE_EVENT_ASYNC_END0(
      "navigation", "RenderFrameHostImpl::BeforeUnload", this);
  // TODO(creis): Support beforeunload on subframes.  For now just pretend that
  // the handler ran and allowed the navigation to proceed.
  if (GetParent()) {
    is_waiting_for_beforeunload_ack_ = false;
    frame_tree_node_->render_manager()->OnBeforeUnloadACK(
        unload_ack_is_for_cross_site_transition_, proceed,
        renderer_before_unload_end_time);
    return;
  }

  render_view_host_->decrement_in_flight_event_count();
  render_view_host_->StopHangMonitorTimeout();
  // If this renderer navigated while the beforeunload request was in flight, we
  // may have cleared this state in OnDidCommitProvisionalLoad, in which case we
  // can ignore this message.
  // However renderer might also be swapped out but we still want to proceed
  // with navigation, otherwise it would block future navigations. This can
  // happen when pending cross-site navigation is canceled by a second one just
  // before OnDidCommitProvisionalLoad while current RVH is waiting for commit
  // but second navigation is started from the beginning.
  if (!is_waiting_for_beforeunload_ack_) {
    return;
  }

  is_waiting_for_beforeunload_ack_ = false;

  base::TimeTicks before_unload_end_time;
  if (!send_before_unload_start_time_.is_null() &&
      !renderer_before_unload_start_time.is_null() &&
      !renderer_before_unload_end_time.is_null()) {
    // When passing TimeTicks across process boundaries, we need to compensate
    // for any skew between the processes. Here we are converting the
    // renderer's notion of before_unload_end_time to TimeTicks in the browser
    // process. See comments in inter_process_time_ticks_converter.h for more.
    InterProcessTimeTicksConverter converter(
        LocalTimeTicks::FromTimeTicks(send_before_unload_start_time_),
        LocalTimeTicks::FromTimeTicks(base::TimeTicks::Now()),
        RemoteTimeTicks::FromTimeTicks(renderer_before_unload_start_time),
        RemoteTimeTicks::FromTimeTicks(renderer_before_unload_end_time));
    LocalTimeTicks browser_before_unload_end_time =
        converter.ToLocalTimeTicks(
            RemoteTimeTicks::FromTimeTicks(renderer_before_unload_end_time));
    before_unload_end_time = browser_before_unload_end_time.ToTimeTicks();

    // Collect UMA on the inter-process skew.
    bool is_skew_additive = false;
    if (converter.IsSkewAdditiveForMetrics()) {
      is_skew_additive = true;
      base::TimeDelta skew = converter.GetSkewForMetrics();
      if (skew >= base::TimeDelta()) {
        UMA_HISTOGRAM_TIMES(
            "InterProcessTimeTicks.BrowserBehind_RendererToBrowser", skew);
      } else {
        UMA_HISTOGRAM_TIMES(
            "InterProcessTimeTicks.BrowserAhead_RendererToBrowser", -skew);
      }
    }
    UMA_HISTOGRAM_BOOLEAN(
        "InterProcessTimeTicks.IsSkewAdditive_RendererToBrowser",
        is_skew_additive);

    frame_tree_node_->navigator()->LogBeforeUnloadTime(
        renderer_before_unload_start_time, renderer_before_unload_end_time);
  }
  frame_tree_node_->render_manager()->OnBeforeUnloadACK(
      unload_ack_is_for_cross_site_transition_, proceed,
      before_unload_end_time);

  // If canceled, notify the delegate to cancel its pending navigation entry.
  if (!proceed)
    render_view_host_->GetDelegate()->DidCancelLoading();
}

bool RenderFrameHostImpl::IsWaitingForUnloadACK() const {
  return render_view_host_->is_waiting_for_close_ack_ ||
      rfh_state_ == STATE_PENDING_SWAP_OUT;
}

void RenderFrameHostImpl::OnSwapOutACK() {
  OnSwappedOut();
}

void RenderFrameHostImpl::OnSwappedOut() {
  // Ignore spurious swap out ack.
  if (rfh_state_ != STATE_PENDING_SWAP_OUT)
    return;

  TRACE_EVENT_ASYNC_END0("navigation", "RenderFrameHostImpl::SwapOut", this);
  swapout_event_monitor_timeout_->Stop();

  if (frame_tree_node_->render_manager()->DeleteFromPendingList(this)) {
    // We are now deleted.
    return;
  }

  // If this RFH wasn't pending deletion, then it is now swapped out.
  SetState(RenderFrameHostImpl::STATE_SWAPPED_OUT);
}

void RenderFrameHostImpl::OnContextMenu(const ContextMenuParams& params) {
  // Validate the URLs in |params|.  If the renderer can't request the URLs
  // directly, don't show them in the context menu.
  ContextMenuParams validated_params(params);
  RenderProcessHost* process = GetProcess();

  // We don't validate |unfiltered_link_url| so that this field can be used
  // when users want to copy the original link URL.
  process->FilterURL(true, &validated_params.link_url);
  process->FilterURL(true, &validated_params.src_url);
  process->FilterURL(false, &validated_params.page_url);
  process->FilterURL(true, &validated_params.frame_url);

  delegate_->ShowContextMenu(this, validated_params);
}

void RenderFrameHostImpl::OnJavaScriptExecuteResponse(
    int id, const base::ListValue& result) {
  const base::Value* result_value;
  if (!result.Get(0, &result_value)) {
    // Programming error or rogue renderer.
    NOTREACHED() << "Got bad arguments for OnJavaScriptExecuteResponse";
    return;
  }

  std::map<int, JavaScriptResultCallback>::iterator it =
      javascript_callbacks_.find(id);
  if (it != javascript_callbacks_.end()) {
    it->second.Run(result_value);
    javascript_callbacks_.erase(it);
  } else {
    NOTREACHED() << "Received script response for unknown request";
  }
}

void RenderFrameHostImpl::OnRunJavaScriptMessage(
    const base::string16& message,
    const base::string16& default_prompt,
    const GURL& frame_url,
    JavaScriptMessageType type,
    IPC::Message* reply_msg) {
  // While a JS message dialog is showing, tabs in the same process shouldn't
  // process input events.
  GetProcess()->SetIgnoreInputEvents(true);
  render_view_host_->StopHangMonitorTimeout();
  delegate_->RunJavaScriptMessage(this, message, default_prompt,
                                  frame_url, type, reply_msg);
}

void RenderFrameHostImpl::OnRunBeforeUnloadConfirm(
    const GURL& frame_url,
    const base::string16& message,
    bool is_reload,
    IPC::Message* reply_msg) {
  // While a JS beforeunload dialog is showing, tabs in the same process
  // shouldn't process input events.
  GetProcess()->SetIgnoreInputEvents(true);
  render_view_host_->StopHangMonitorTimeout();
  delegate_->RunBeforeUnloadConfirm(this, message, is_reload, reply_msg);
}

void RenderFrameHostImpl::OnRequestPlatformNotificationPermission(
    const GURL& origin, int request_id) {
  base::Callback<void(blink::WebNotificationPermission)> done_callback =
      base::Bind(
          &RenderFrameHostImpl::PlatformNotificationPermissionRequestDone,
          weak_ptr_factory_.GetWeakPtr(),
          request_id);

  GetContentClient()->browser()->RequestDesktopNotificationPermission(
      origin, this, done_callback);
}

void RenderFrameHostImpl::OnShowDesktopNotification(
    int notification_id,
    const ShowDesktopNotificationHostMsgParams& params) {
  scoped_ptr<DesktopNotificationDelegateImpl> delegate(
      new DesktopNotificationDelegateImpl(this, notification_id));

  base::Closure cancel_callback;
  GetContentClient()->browser()->ShowDesktopNotification(
      params, this, delegate.Pass(), &cancel_callback);
  cancel_notification_callbacks_[notification_id] = cancel_callback;
}

void RenderFrameHostImpl::OnCancelDesktopNotification(int notification_id) {
  if (!cancel_notification_callbacks_.count(notification_id)) {
    NOTREACHED();
    return;
  }
  cancel_notification_callbacks_[notification_id].Run();
  cancel_notification_callbacks_.erase(notification_id);
}

void RenderFrameHostImpl::OnTextSurroundingSelectionResponse(
    const base::string16& content,
    size_t start_offset,
    size_t end_offset) {
  render_view_host_->OnTextSurroundingSelectionResponse(
      content, start_offset, end_offset);
}

void RenderFrameHostImpl::OnDidAccessInitialDocument() {
  delegate_->DidAccessInitialDocument();
}

void RenderFrameHostImpl::OnDidDisownOpener() {
  // This message is only sent for top-level frames. TODO(avi): when frame tree
  // mirroring works correctly, add a check here to enforce it.
  delegate_->DidDisownOpener(this);
}

void RenderFrameHostImpl::OnDidAssignPageId(int32 page_id) {
  // Update the RVH's current page ID so that future IPCs from the renderer
  // correspond to the new page.
  render_view_host_->page_id_ = page_id;
}

void RenderFrameHostImpl::OnUpdateTitle(
    int32 page_id,
    const base::string16& title,
    blink::WebTextDirection title_direction) {
  CHECK_EQ(render_view_host_->page_id_, page_id);
  // This message is only sent for top-level frames. TODO(avi): when frame tree
  // mirroring works correctly, add a check here to enforce it.
  if (title.length() > kMaxTitleChars) {
    NOTREACHED() << "Renderer sent too many characters in title.";
    return;
  }

  delegate_->UpdateTitle(this, page_id, title,
                         WebTextDirectionToChromeTextDirection(
                             title_direction));
}

void RenderFrameHostImpl::OnUpdateEncoding(const std::string& encoding_name) {
  // This message is only sent for top-level frames. TODO(avi): when frame tree
  // mirroring works correctly, add a check here to enforce it.
  delegate_->UpdateEncoding(this, encoding_name);
}

void RenderFrameHostImpl::OnBeginNavigation(
    const FrameHostMsg_BeginNavigation_Params& params,
    const CommonNavigationParams& common_params) {
  CHECK(CommandLine::ForCurrentProcess()->HasSwitch(
      switches::kEnableBrowserSideNavigation));
  frame_tree_node()->navigator()->OnBeginNavigation(
      frame_tree_node(), params, common_params);
}

void RenderFrameHostImpl::OnAccessibilityEvents(
    const std::vector<AccessibilityHostMsg_EventParams>& params) {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());

  AccessibilityMode accessibility_mode = delegate_->GetAccessibilityMode();
  if ((accessibility_mode != AccessibilityModeOff) && view &&
      RenderFrameHostImpl::IsRFHStateActive(rfh_state())) {
    if (accessibility_mode & AccessibilityModeFlagPlatform) {
      GetOrCreateBrowserAccessibilityManager();
      if (browser_accessibility_manager_)
        browser_accessibility_manager_->OnAccessibilityEvents(params);
    }

    if (browser_accessibility_manager_) {
      // Get the frame routing ids from out-of-process iframes and
      // browser plugin instance ids from guests and update the mappings in
      // FrameAccessibility.
      for (unsigned int i = 0; i < params.size(); ++i) {
        const AccessibilityHostMsg_EventParams& param = params[i];
        UpdateCrossProcessIframeAccessibility(
            param.node_to_frame_routing_id_map);
        UpdateGuestFrameAccessibility(
            param.node_to_browser_plugin_instance_id_map);
      }
    }

    // Send the updates to the automation extension API.
    std::vector<AXEventNotificationDetails> details;
    details.reserve(params.size());
    for (size_t i = 0; i < params.size(); ++i) {
      const AccessibilityHostMsg_EventParams& param = params[i];
      AXEventNotificationDetails detail(param.update.node_id_to_clear,
                                        param.update.nodes,
                                        param.event_type,
                                        param.id,
                                        GetProcess()->GetID(),
                                        routing_id_);
      details.push_back(detail);
    }

    delegate_->AccessibilityEventReceived(details);
  }

  // Always send an ACK or the renderer can be in a bad state.
  Send(new AccessibilityMsg_Events_ACK(routing_id_));

  // The rest of this code is just for testing; bail out if we're not
  // in that mode.
  if (accessibility_testing_callback_.is_null())
    return;

  for (size_t i = 0; i < params.size(); i++) {
    const AccessibilityHostMsg_EventParams& param = params[i];
    if (static_cast<int>(param.event_type) < 0)
      continue;

    if (!ax_tree_for_testing_) {
      if (browser_accessibility_manager_) {
        ax_tree_for_testing_.reset(new ui::AXTree(
            browser_accessibility_manager_->SnapshotAXTreeForTesting()));
      } else {
        ax_tree_for_testing_.reset(new ui::AXTree());
        CHECK(ax_tree_for_testing_->Unserialize(param.update))
            << ax_tree_for_testing_->error();
      }
    } else {
      CHECK(ax_tree_for_testing_->Unserialize(param.update))
          << ax_tree_for_testing_->error();
    }
    accessibility_testing_callback_.Run(param.event_type, param.id);
  }
}

void RenderFrameHostImpl::OnAccessibilityLocationChanges(
    const std::vector<AccessibilityHostMsg_LocationChangeParams>& params) {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view && RenderFrameHostImpl::IsRFHStateActive(rfh_state())) {
    AccessibilityMode accessibility_mode = delegate_->GetAccessibilityMode();
    if (accessibility_mode & AccessibilityModeFlagPlatform) {
      if (!browser_accessibility_manager_) {
        browser_accessibility_manager_.reset(
            view->CreateBrowserAccessibilityManager(this));
      }
      if (browser_accessibility_manager_)
        browser_accessibility_manager_->OnLocationChanges(params);
    }
    // TODO(aboxhall): send location change events to web contents observers too
  }
}

#if defined(OS_MACOSX) || defined(OS_ANDROID)
void RenderFrameHostImpl::OnShowPopup(
    const FrameHostMsg_ShowPopup_Params& params) {
  RenderViewHostDelegateView* view =
      render_view_host_->delegate_->GetDelegateView();
  if (view) {
    view->ShowPopupMenu(this,
                        params.bounds,
                        params.item_height,
                        params.item_font_size,
                        params.selected_item,
                        params.popup_items,
                        params.right_aligned,
                        params.allow_multiple_selection);
  }
}

void RenderFrameHostImpl::OnHidePopup() {
  RenderViewHostDelegateView* view =
      render_view_host_->delegate_->GetDelegateView();
  if (view)
    view->HidePopupMenu();
}
#endif

void RenderFrameHostImpl::SetState(RenderFrameHostImplState rfh_state) {
  // Only main frames should be swapped out and retained inside a proxy host.
  if (rfh_state == STATE_SWAPPED_OUT)
    CHECK(!GetParent());

  // We update the number of RenderFrameHosts in a SiteInstance when the swapped
  // out status of a RenderFrameHost gets flipped to/from active.
  if (!IsRFHStateActive(rfh_state_) && IsRFHStateActive(rfh_state))
    GetSiteInstance()->increment_active_frame_count();
  else if (IsRFHStateActive(rfh_state_) && !IsRFHStateActive(rfh_state))
    GetSiteInstance()->decrement_active_frame_count();

  // The active and swapped out state of the RVH is determined by its main
  // frame, since subframes should have their own widgets.
  if (frame_tree_node_->IsMainFrame()) {
    render_view_host_->set_is_active(IsRFHStateActive(rfh_state));
    render_view_host_->set_is_swapped_out(rfh_state == STATE_SWAPPED_OUT);
  }

  // Whenever we change the RFH state to and from active or swapped out state,
  // we should not be waiting for beforeunload or close acks.  We clear them
  // here to be safe, since they can cause navigations to be ignored in
  // OnDidCommitProvisionalLoad.
  // TODO(creis): Move is_waiting_for_beforeunload_ack_ into the state machine.
  if (rfh_state == STATE_DEFAULT ||
      rfh_state == STATE_SWAPPED_OUT ||
      rfh_state_ == STATE_DEFAULT ||
      rfh_state_ == STATE_SWAPPED_OUT) {
    is_waiting_for_beforeunload_ack_ = false;
    render_view_host_->is_waiting_for_close_ack_ = false;
  }
  rfh_state_ = rfh_state;
}

bool RenderFrameHostImpl::CanCommitURL(const GURL& url) {
  // TODO(creis): We should also check for WebUI pages here.  Also, when the
  // out-of-process iframes implementation is ready, we should check for
  // cross-site URLs that are not allowed to commit in this process.

  // Give the client a chance to disallow URLs from committing.
  return GetContentClient()->browser()->CanCommitURL(GetProcess(), url);
}

void RenderFrameHostImpl::Navigate(const FrameMsg_Navigate_Params& params) {
  TRACE_EVENT0("navigation", "RenderFrameHostImpl::Navigate");
  // Browser plugin guests are not allowed to navigate outside web-safe schemes,
  // so do not grant them the ability to request additional URLs.
  if (!GetProcess()->IsIsolatedGuest()) {
    ChildProcessSecurityPolicyImpl::GetInstance()->GrantRequestURL(
        GetProcess()->GetID(), params.common_params.url);
    if (params.common_params.url.SchemeIs(url::kDataScheme) &&
        params.base_url_for_data_url.SchemeIs(url::kFileScheme)) {
      // If 'data:' is used, and we have a 'file:' base url, grant access to
      // local files.
      ChildProcessSecurityPolicyImpl::GetInstance()->GrantRequestURL(
          GetProcess()->GetID(), params.base_url_for_data_url);
    }
  }

  // Only send the message if we aren't suspended at the start of a cross-site
  // request.
  if (navigations_suspended_) {
    // Shouldn't be possible to have a second navigation while suspended, since
    // navigations will only be suspended during a cross-site request.  If a
    // second navigation occurs, RenderFrameHostManager will cancel this pending
    // RFH and create a new pending RFH.
    DCHECK(!suspended_nav_params_.get());
    suspended_nav_params_.reset(new FrameMsg_Navigate_Params(params));
  } else {
    // Get back to a clean state, in case we start a new navigation without
    // completing a RFH swap or unload handler.
    SetState(RenderFrameHostImpl::STATE_DEFAULT);

    Send(new FrameMsg_Navigate(routing_id_, params));
  }

  // Force the throbber to start. We do this because Blink's "started
  // loading" message will be received asynchronously from the UI of the
  // browser. But we want to keep the throbber in sync with what's happening
  // in the UI. For example, we want to start throbbing immediately when the
  // user naivgates even if the renderer is delayed. There is also an issue
  // with the throbber starting because the WebUI (which controls whether the
  // favicon is displayed) happens synchronously. If the start loading
  // messages was asynchronous, then the default favicon would flash in.
  //
  // Blink doesn't send throb notifications for JavaScript URLs, so we
  // don't want to either.
  if (!params.common_params.url.SchemeIs(url::kJavaScriptScheme))
    delegate_->DidStartLoading(this, true);
}

void RenderFrameHostImpl::NavigateToURL(const GURL& url) {
  FrameMsg_Navigate_Params params;
  params.common_params.url = url;
  params.common_params.transition = ui::PAGE_TRANSITION_LINK;
  params.common_params.navigation_type = FrameMsg_Navigate_Type::NORMAL;
  params.commit_params.browser_navigation_start = base::TimeTicks::Now();
  params.page_id = -1;
  params.pending_history_list_offset = -1;
  params.current_history_list_offset = -1;
  params.current_history_list_length = 0;
  Navigate(params);
}

void RenderFrameHostImpl::OpenURL(const FrameHostMsg_OpenURL_Params& params) {
  OnOpenURL(params);
}

void RenderFrameHostImpl::Stop() {
  Send(new FrameMsg_Stop(routing_id_));
}

void RenderFrameHostImpl::DispatchBeforeUnload(bool for_cross_site_transition) {
  TRACE_EVENT_ASYNC_BEGIN0(
      "navigation", "RenderFrameHostImpl::BeforeUnload", this);
  // TODO(creis): Support subframes.
  if (GetParent() || !IsRenderFrameLive()) {
    // We don't have a live renderer, so just skip running beforeunload.
    is_waiting_for_beforeunload_ack_ = true;
    unload_ack_is_for_cross_site_transition_ = for_cross_site_transition;
    base::TimeTicks now = base::TimeTicks::Now();
    OnBeforeUnloadACK(true, now, now);
    return;
  }

  // This may be called more than once (if the user clicks the tab close button
  // several times, or if she clicks the tab close button then the browser close
  // button), and we only send the message once.
  if (is_waiting_for_beforeunload_ack_) {
    // Some of our close messages could be for the tab, others for cross-site
    // transitions. We always want to think it's for closing the tab if any
    // of the messages were, since otherwise it might be impossible to close
    // (if there was a cross-site "close" request pending when the user clicked
    // the close button). We want to keep the "for cross site" flag only if
    // both the old and the new ones are also for cross site.
    unload_ack_is_for_cross_site_transition_ =
        unload_ack_is_for_cross_site_transition_ && for_cross_site_transition;
  } else {
    // Start the hang monitor in case the renderer hangs in the beforeunload
    // handler.
    is_waiting_for_beforeunload_ack_ = true;
    unload_ack_is_for_cross_site_transition_ = for_cross_site_transition;
    // Increment the in-flight event count, to ensure that input events won't
    // cancel the timeout timer.
    render_view_host_->increment_in_flight_event_count();
    render_view_host_->StartHangMonitorTimeout(
        TimeDelta::FromMilliseconds(RenderViewHostImpl::kUnloadTimeoutMS));
    send_before_unload_start_time_ = base::TimeTicks::Now();
    Send(new FrameMsg_BeforeUnload(routing_id_));
  }
}

void RenderFrameHostImpl::DisownOpener() {
  Send(new FrameMsg_DisownOpener(GetRoutingID()));
}

void RenderFrameHostImpl::ExtendSelectionAndDelete(size_t before,
                                                   size_t after) {
  Send(new InputMsg_ExtendSelectionAndDelete(routing_id_, before, after));
}

void RenderFrameHostImpl::JavaScriptDialogClosed(
    IPC::Message* reply_msg,
    bool success,
    const base::string16& user_input,
    bool dialog_was_suppressed) {
  GetProcess()->SetIgnoreInputEvents(false);
  bool is_waiting = is_waiting_for_beforeunload_ack_ || IsWaitingForUnloadACK();

  // If we are executing as part of (before)unload event handling, we don't
  // want to use the regular hung_renderer_delay_ms_ if the user has agreed to
  // leave the current page. In this case, use the regular timeout value used
  // during the (before)unload handling.
  if (is_waiting) {
    render_view_host_->StartHangMonitorTimeout(TimeDelta::FromMilliseconds(
        success ? RenderViewHostImpl::kUnloadTimeoutMS
                : render_view_host_->hung_renderer_delay_ms_));
  }

  FrameHostMsg_RunJavaScriptMessage::WriteReplyParams(reply_msg,
                                                      success, user_input);
  Send(reply_msg);

  // If we are waiting for an unload or beforeunload ack and the user has
  // suppressed messages, kill the tab immediately; a page that's spamming
  // alerts in onbeforeunload is presumably malicious, so there's no point in
  // continuing to run its script and dragging out the process.
  // This must be done after sending the reply since RenderView can't close
  // correctly while waiting for a response.
  if (is_waiting && dialog_was_suppressed)
    render_view_host_->delegate_->RendererUnresponsive(render_view_host_);
}

void RenderFrameHostImpl::NotificationClosed(int notification_id) {
  cancel_notification_callbacks_.erase(notification_id);
}

// PlzNavigate
void RenderFrameHostImpl::CommitNavigation(
    ResourceResponse* response,
    scoped_ptr<StreamHandle> body,
    const CommonNavigationParams& common_params,
    const CommitNavigationParams& commit_params) {
  // TODO(clamy): Check if we have to add security checks for the browser plugin
  // guests.

  Send(new FrameMsg_CommitNavigation(
      routing_id_, response->head, body->GetURL(),
      common_params, commit_params));
  // TODO(clamy): Check if we should start the throbber for non javascript urls
  // here.

  // TODO(clamy): Release the stream handle once the renderer has finished
  // reading it.
  stream_handle_ = body.Pass();
}

void RenderFrameHostImpl::PlatformNotificationPermissionRequestDone(
    int request_id, blink::WebNotificationPermission permission) {
  Send(new PlatformNotificationMsg_PermissionRequestComplete(
      routing_id_, request_id, permission));
}

void RenderFrameHostImpl::UpdateCrossProcessIframeAccessibility(
    const std::map<int32, int> node_to_frame_routing_id_map) {
  std::map<int32, int>::const_iterator iter;
  for (iter = node_to_frame_routing_id_map.begin();
       iter != node_to_frame_routing_id_map.end();
       ++iter) {
    // This is the id of the accessibility node that has a child frame.
    int32 node_id = iter->first;
    // The routing id from either a RenderFrame or a RenderFrameProxy.
    int frame_routing_id = iter->second;

    FrameTree* frame_tree = frame_tree_node()->frame_tree();
    FrameTreeNode* child_frame_tree_node = frame_tree->FindByRoutingID(
        GetProcess()->GetID(), frame_routing_id);
    if (child_frame_tree_node) {
      FrameAccessibility::GetInstance()->AddChildFrame(
          this, node_id, child_frame_tree_node->frame_tree_node_id());
    }
  }
}

void RenderFrameHostImpl::UpdateGuestFrameAccessibility(
    const std::map<int32, int> node_to_browser_plugin_instance_id_map) {
  std::map<int32, int>::const_iterator iter;
  for (iter = node_to_browser_plugin_instance_id_map.begin();
       iter != node_to_browser_plugin_instance_id_map.end();
       ++iter) {
    // This is the id of the accessibility node that hosts a plugin.
    int32 node_id = iter->first;
    // The id of the browser plugin.
    int browser_plugin_instance_id = iter->second;
    FrameAccessibility::GetInstance()->AddGuestWebContents(
        this, node_id, browser_plugin_instance_id);
  }
}

void RenderFrameHostImpl::SetAccessibilityMode(AccessibilityMode mode) {
  Send(new FrameMsg_SetAccessibilityMode(routing_id_, mode));
}

void RenderFrameHostImpl::SetAccessibilityCallbackForTesting(
    const base::Callback<void(ui::AXEvent, int)>& callback) {
  accessibility_testing_callback_ = callback;
}

const ui::AXTree* RenderFrameHostImpl::GetAXTreeForTesting() {
  return ax_tree_for_testing_.get();
}

BrowserAccessibilityManager*
    RenderFrameHostImpl::GetOrCreateBrowserAccessibilityManager() {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view &&
      !browser_accessibility_manager_) {
    browser_accessibility_manager_.reset(
        view->CreateBrowserAccessibilityManager(this));
  }
  return browser_accessibility_manager_.get();
}

#if defined(OS_WIN)

void RenderFrameHostImpl::SetParentNativeViewAccessible(
    gfx::NativeViewAccessible accessible_parent) {
  RenderWidgetHostViewBase* view = static_cast<RenderWidgetHostViewBase*>(
      render_view_host_->GetView());
  if (view)
    view->SetParentNativeViewAccessible(accessible_parent);
}

gfx::NativeViewAccessible
RenderFrameHostImpl::GetParentNativeViewAccessible() const {
  return delegate_->GetParentNativeViewAccessible();
}

#elif defined(OS_MACOSX)

void RenderFrameHostImpl::DidSelectPopupMenuItem(int selected_index) {
  Send(new FrameMsg_SelectPopupMenuItem(routing_id_, selected_index));
}

void RenderFrameHostImpl::DidCancelPopupMenu() {
  Send(new FrameMsg_SelectPopupMenuItem(routing_id_, -1));
}

#elif defined(OS_ANDROID)

void RenderFrameHostImpl::DidSelectPopupMenuItems(
    const std::vector<int>& selected_indices) {
  Send(new FrameMsg_SelectPopupMenuItems(routing_id_, false, selected_indices));
}

void RenderFrameHostImpl::DidCancelPopupMenu() {
  Send(new FrameMsg_SelectPopupMenuItems(
      routing_id_, true, std::vector<int>()));
}

#endif

void RenderFrameHostImpl::ClearPendingTransitionRequestData() {
  BrowserThread::PostTask(
      BrowserThread::IO,
      FROM_HERE,
      base::Bind(
          &TransitionRequestManager::ClearPendingTransitionRequestData,
          base::Unretained(TransitionRequestManager::GetInstance()),
          GetProcess()->GetID(),
          routing_id_));
}

void RenderFrameHostImpl::SetNavigationsSuspended(
    bool suspend,
    const base::TimeTicks& proceed_time) {
  // This should only be called to toggle the state.
  DCHECK(navigations_suspended_ != suspend);

  navigations_suspended_ = suspend;
  if (navigations_suspended_) {
    TRACE_EVENT_ASYNC_BEGIN0("navigation",
                             "RenderFrameHostImpl navigation suspended", this);
  } else {
    TRACE_EVENT_ASYNC_END0("navigation",
                           "RenderFrameHostImpl navigation suspended", this);
  }

  if (!suspend && suspended_nav_params_) {
    // There's navigation message params waiting to be sent. Now that we're not
    // suspended anymore, resume navigation by sending them. If we were swapped
    // out, we should also stop filtering out the IPC messages now.
    SetState(RenderFrameHostImpl::STATE_DEFAULT);

    DCHECK(!proceed_time.is_null());
    suspended_nav_params_->commit_params.browser_navigation_start =
        proceed_time;
    Send(new FrameMsg_Navigate(routing_id_, *suspended_nav_params_));
    suspended_nav_params_.reset();
  }
}

void RenderFrameHostImpl::CancelSuspendedNavigations() {
  // Clear any state if a pending navigation is canceled or preempted.
  if (suspended_nav_params_)
    suspended_nav_params_.reset();

  TRACE_EVENT_ASYNC_END0("navigation",
                         "RenderFrameHostImpl navigation suspended", this);
  navigations_suspended_ = false;
}

}  // namespace content