// 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/renderer/render_frame_impl.h"

#include <map>
#include <string>

#include "base/command_line.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "content/child/appcache/appcache_dispatcher.h"
#include "content/child/plugin_messages.h"
#include "content/child/quota_dispatcher.h"
#include "content/child/request_extra_data.h"
#include "content/child/service_worker/web_service_worker_provider_impl.h"
#include "content/common/frame_messages.h"
#include "content/common/socket_stream_handle_data.h"
#include "content/common/swapped_out_messages.h"
#include "content/common/view_messages.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/renderer/content_renderer_client.h"
#include "content/public/renderer/document_state.h"
#include "content/public/renderer/navigation_state.h"
#include "content/renderer/browser_plugin/browser_plugin.h"
#include "content/renderer/browser_plugin/browser_plugin_manager.h"
#include "content/renderer/internal_document_state_data.h"
#include "content/renderer/npapi/plugin_channel_host.h"
#include "content/renderer/render_thread_impl.h"
#include "content/renderer/render_view_impl.h"
#include "content/renderer/renderer_webapplicationcachehost_impl.h"
#include "content/renderer/websharedworker_proxy.h"
#include "net/base/net_errors.h"
#include "net/http/http_util.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/platform/WebURLError.h"
#include "third_party/WebKit/public/platform/WebURLResponse.h"
#include "third_party/WebKit/public/platform/WebVector.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebNavigationPolicy.h"
#include "third_party/WebKit/public/web/WebPlugin.h"
#include "third_party/WebKit/public/web/WebPluginParams.h"
#include "third_party/WebKit/public/web/WebSearchableFormData.h"
#include "third_party/WebKit/public/web/WebSecurityOrigin.h"
#include "third_party/WebKit/public/web/WebStorageQuotaCallbacks.h"
#include "third_party/WebKit/public/web/WebUserGestureIndicator.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "webkit/child/weburlresponse_extradata_impl.h"

#if defined(ENABLE_WEBRTC)
#include "content/renderer/media/rtc_peer_connection_handler.h"
#endif

using WebKit::WebDataSource;
using WebKit::WebDocument;
using WebKit::WebFrame;
using WebKit::WebNavigationPolicy;
using WebKit::WebPluginParams;
using WebKit::WebReferrerPolicy;
using WebKit::WebSearchableFormData;
using WebKit::WebSecurityOrigin;
using WebKit::WebServiceWorkerProvider;
using WebKit::WebStorageQuotaCallbacks;
using WebKit::WebString;
using WebKit::WebURL;
using WebKit::WebURLError;
using WebKit::WebURLRequest;
using WebKit::WebURLResponse;
using WebKit::WebUserGestureIndicator;
using WebKit::WebVector;
using WebKit::WebView;
using base::Time;
using base::TimeDelta;
using webkit_glue::WebURLResponseExtraDataImpl;

namespace content {

namespace {

typedef std::map<WebKit::WebFrame*, RenderFrameImpl*> FrameMap;
base::LazyInstance<FrameMap> g_child_frame_map = LAZY_INSTANCE_INITIALIZER;

}  // namespace

static RenderFrameImpl* (*g_create_render_frame_impl)(RenderViewImpl*, int32) =
    NULL;

// static
RenderFrameImpl* RenderFrameImpl::Create(RenderViewImpl* render_view,
                                         int32 routing_id) {
  DCHECK(routing_id != MSG_ROUTING_NONE);

  if (g_create_render_frame_impl)
    return g_create_render_frame_impl(render_view, routing_id);
  else
    return new RenderFrameImpl(render_view, routing_id);
}

// static
void RenderFrameImpl::InstallCreateHook(
    RenderFrameImpl* (*create_render_frame_impl)(RenderViewImpl*, int32)) {
  CHECK(!g_create_render_frame_impl);
  g_create_render_frame_impl = create_render_frame_impl;
}

// RenderFrameImpl ----------------------------------------------------------
RenderFrameImpl::RenderFrameImpl(RenderViewImpl* render_view, int routing_id)
    : render_view_(render_view),
      routing_id_(routing_id),
      is_swapped_out_(false),
      is_detaching_(false) {
}

RenderFrameImpl::~RenderFrameImpl() {
}

int RenderFrameImpl::GetRoutingID() const {
  return routing_id_;
}

bool RenderFrameImpl::Send(IPC::Message* message) {
  if (is_detaching_ ||
      ((is_swapped_out_ || render_view_->is_swapped_out()) &&
       !SwappedOutMessages::CanSendWhileSwappedOut(message))) {
    delete message;
    return false;
  }

  return RenderThread::Get()->Send(message);
}

bool RenderFrameImpl::OnMessageReceived(const IPC::Message& msg) {
  // TODO(ajwong): Fill in with message handlers as various components
  // are migrated over to understand frames.
  return false;
}

// WebKit::WebFrameClient implementation -------------------------------------

WebKit::WebPlugin* RenderFrameImpl::createPlugin(
    WebKit::WebFrame* frame,
    const WebKit::WebPluginParams& params) {
  WebKit::WebPlugin* plugin = NULL;
  if (GetContentClient()->renderer()->OverrideCreatePlugin(
          render_view_, frame, params, &plugin)) {
    return plugin;
  }

#if defined(ENABLE_PLUGINS)
  if (UTF16ToASCII(params.mimeType) == kBrowserPluginMimeType) {
    return render_view_->GetBrowserPluginManager()->CreateBrowserPlugin(
        render_view_, frame, params);
  }

  WebPluginInfo info;
  std::string mime_type;
  bool found = render_view_->GetPluginInfo(
      params.url, frame->top()->document().url(), params.mimeType.utf8(),
      &info, &mime_type);
  if (!found)
    return NULL;

  WebPluginParams params_to_use = params;
  params_to_use.mimeType = WebString::fromUTF8(mime_type);
  return render_view_->CreatePlugin(frame, info, params_to_use);
#else
  return NULL;
#endif  // defined(ENABLE_PLUGINS)
}

WebKit::WebMediaPlayer* RenderFrameImpl::createMediaPlayer(
    WebKit::WebFrame* frame,
    const WebKit::WebURL& url,
    WebKit::WebMediaPlayerClient* client) {
  // TODO(nasko): Moving the implementation here involves moving a few media
  // related client objects here or referencing them in the RenderView. Needs
  // more work to understand where the proper place for those objects is.
  return render_view_->createMediaPlayer(frame, url, client);
}

WebKit::WebApplicationCacheHost* RenderFrameImpl::createApplicationCacheHost(
    WebKit::WebFrame* frame,
    WebKit::WebApplicationCacheHostClient* client) {
  if (!frame || !frame->view())
    return NULL;
  return new RendererWebApplicationCacheHostImpl(
      RenderViewImpl::FromWebView(frame->view()), client,
      RenderThreadImpl::current()->appcache_dispatcher()->backend_proxy());
}

WebKit::WebCookieJar* RenderFrameImpl::cookieJar(WebKit::WebFrame* frame) {
  return render_view_->cookieJar(frame);
}

WebKit::WebServiceWorkerProvider* RenderFrameImpl::createServiceWorkerProvider(
    WebKit::WebFrame* frame,
    WebKit::WebServiceWorkerProviderClient* client) {
  return new WebServiceWorkerProviderImpl(
      ChildThread::current()->thread_safe_sender(),
      ChildThread::current()->service_worker_message_filter(),
      GURL(frame->document().securityOrigin().toString()),
      make_scoped_ptr(client));
}

void RenderFrameImpl::didAccessInitialDocument(WebKit::WebFrame* frame) {
  render_view_->didAccessInitialDocument(frame);
}

WebKit::WebFrame* RenderFrameImpl::createChildFrame(
    WebKit::WebFrame* parent,
    const WebKit::WebString& name) {
  RenderFrameImpl* child_render_frame = this;
  long long child_frame_identifier = WebFrame::generateEmbedderIdentifier();
  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
    // Synchronously notify the browser of a child frame creation to get the
    // routing_id for the RenderFrame.
    int routing_id;
    Send(new FrameHostMsg_CreateChildFrame(GetRoutingID(),
                                           parent->identifier(),
                                           child_frame_identifier,
                                           UTF16ToUTF8(name),
                                           &routing_id));
    child_render_frame = RenderFrameImpl::Create(render_view_, routing_id);
  }

  WebKit::WebFrame* web_frame = WebFrame::create(child_render_frame,
                                                 child_frame_identifier);

  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
    g_child_frame_map.Get().insert(
        std::make_pair(web_frame, child_render_frame));
  }

  return web_frame;
}

void RenderFrameImpl::didDisownOpener(WebKit::WebFrame* frame) {
  render_view_->didDisownOpener(frame);
}

void RenderFrameImpl::frameDetached(WebKit::WebFrame* frame) {
  // Currently multiple WebCore::Frames can send frameDetached to a single
  // RenderFrameImpl. This is legacy behavior from when RenderViewImpl served
  // as a shared WebFrameClient for multiple Webcore::Frame objects. It also
  // prevents this class from entering the |is_detaching_| state because
  // even though one WebCore::Frame may have detached itself, others will
  // still need to use this object.
  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
    // TODO(ajwong): Add CHECK(!is_detaching_) once we guarantee each
    // RenderFrameImpl is only used by one WebCore::Frame.
    is_detaching_ = true;
  }

  int64 parent_frame_id = -1;
  if (frame->parent())
    parent_frame_id = frame->parent()->identifier();

  render_view_->Send(new FrameHostMsg_Detach(GetRoutingID(), parent_frame_id,
                                             frame->identifier()));

  // Call back to RenderViewImpl for observers to be notified.
  // TODO(nasko): Remove once we have RenderFrameObserver.
  render_view_->frameDetached(frame);

  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
    FrameMap::iterator it = g_child_frame_map.Get().find(frame);
    DCHECK(it != g_child_frame_map.Get().end());
    DCHECK_EQ(it->second, this);
    delete it->second;
    g_child_frame_map.Get().erase(it);
  }

  frame->close();
}

void RenderFrameImpl::willClose(WebKit::WebFrame* frame) {
  // Call back to RenderViewImpl for observers to be notified.
  // TODO(nasko): Remove once we have RenderFrameObserver.
  render_view_->willClose(frame);
}

void RenderFrameImpl::didChangeName(WebKit::WebFrame* frame,
                                    const WebKit::WebString& name) {
  if (!render_view_->renderer_preferences_.report_frame_name_changes)
    return;

  render_view_->Send(
      new ViewHostMsg_UpdateFrameName(render_view_->GetRoutingID(),
                                      frame->identifier(),
                                      !frame->parent(),
                                      UTF16ToUTF8(name)));
}

void RenderFrameImpl::didMatchCSS(
    WebKit::WebFrame* frame,
    const WebKit::WebVector<WebKit::WebString>& newly_matching_selectors,
    const WebKit::WebVector<WebKit::WebString>& stopped_matching_selectors) {
  render_view_->didMatchCSS(
      frame, newly_matching_selectors, stopped_matching_selectors);
}

void RenderFrameImpl::loadURLExternally(WebKit::WebFrame* frame,
                                        const WebKit::WebURLRequest& request,
                                        WebKit::WebNavigationPolicy policy) {
  loadURLExternally(frame, request, policy, WebString());
}

void RenderFrameImpl::loadURLExternally(
    WebKit::WebFrame* frame,
    const WebKit::WebURLRequest& request,
    WebKit::WebNavigationPolicy policy,
    const WebKit::WebString& suggested_name) {
  Referrer referrer(RenderViewImpl::GetReferrerFromRequest(frame, request));
  if (policy == WebKit::WebNavigationPolicyDownload) {
    render_view_->Send(new ViewHostMsg_DownloadUrl(render_view_->GetRoutingID(),
                                                   request.url(), referrer,
                                                   suggested_name));
  } else {
    render_view_->OpenURL(frame, request.url(), referrer, policy);
  }
}

WebKit::WebNavigationPolicy RenderFrameImpl::decidePolicyForNavigation(
    WebKit::WebFrame* frame,
    WebKit::WebDataSource::ExtraData* extra_data,
    const WebKit::WebURLRequest& request,
    WebKit::WebNavigationType type,
    WebKit::WebNavigationPolicy default_policy,
    bool is_redirect) {
  return render_view_->decidePolicyForNavigation(
      frame, extra_data, request, type, default_policy, is_redirect);
}

WebKit::WebNavigationPolicy RenderFrameImpl::decidePolicyForNavigation(
    WebKit::WebFrame* frame,
    const WebKit::WebURLRequest& request,
    WebKit::WebNavigationType type,
    WebKit::WebNavigationPolicy default_policy,
    bool is_redirect) {
  return render_view_->decidePolicyForNavigation(
      frame, request, type, default_policy, is_redirect);
}

void RenderFrameImpl::willSendSubmitEvent(WebKit::WebFrame* frame,
                                          const WebKit::WebFormElement& form) {
  // Call back to RenderViewImpl for observers to be notified.
  // TODO(nasko): Remove once we have RenderFrameObserver.
  render_view_->willSendSubmitEvent(frame, form);
}

void RenderFrameImpl::willSubmitForm(WebKit::WebFrame* frame,
                                     const WebKit::WebFormElement& form) {
  DocumentState* document_state =
      DocumentState::FromDataSource(frame->provisionalDataSource());
  NavigationState* navigation_state = document_state->navigation_state();
  InternalDocumentStateData* internal_data =
      InternalDocumentStateData::FromDocumentState(document_state);

  if (PageTransitionCoreTypeIs(navigation_state->transition_type(),
                               PAGE_TRANSITION_LINK)) {
    navigation_state->set_transition_type(PAGE_TRANSITION_FORM_SUBMIT);
  }

  // Save these to be processed when the ensuing navigation is committed.
  WebSearchableFormData web_searchable_form_data(form);
  internal_data->set_searchable_form_url(web_searchable_form_data.url());
  internal_data->set_searchable_form_encoding(
      web_searchable_form_data.encoding().utf8());

  // Call back to RenderViewImpl for observers to be notified.
  // TODO(nasko): Remove once we have RenderFrameObserver.
  render_view_->willSubmitForm(frame, form);
}

void RenderFrameImpl::didCreateDataSource(WebKit::WebFrame* frame,
                                          WebKit::WebDataSource* datasource) {
  // TODO(nasko): Move implementation here. Needed state:
  // * pending_navigation_params_
  // * webview
  // Needed methods:
  // * PopulateDocumentStateFromPending
  // * CreateNavigationStateFromPending
  render_view_->didCreateDataSource(frame, datasource);
}

void RenderFrameImpl::didStartProvisionalLoad(WebKit::WebFrame* frame) {
  WebDataSource* ds = frame->provisionalDataSource();

  // In fast/loader/stop-provisional-loads.html, we abort the load before this
  // callback is invoked.
  if (!ds)
    return;

  DocumentState* document_state = DocumentState::FromDataSource(ds);

  // We should only navigate to swappedout:// when is_swapped_out_ is true.
  CHECK((ds->request().url() != GURL(kSwappedOutURL)) ||
        render_view_->is_swapped_out()) <<
        "Heard swappedout:// when not swapped out.";

  // Update the request time if WebKit has better knowledge of it.
  if (document_state->request_time().is_null()) {
    double event_time = ds->triggeringEventTime();
    if (event_time != 0.0)
      document_state->set_request_time(Time::FromDoubleT(event_time));
  }

  // Start time is only set after request time.
  document_state->set_start_load_time(Time::Now());

  bool is_top_most = !frame->parent();
  if (is_top_most) {
    render_view_->set_navigation_gesture(
        WebUserGestureIndicator::isProcessingUserGesture() ?
            NavigationGestureUser : NavigationGestureAuto);
  } else if (ds->replacesCurrentHistoryItem()) {
    // Subframe navigations that don't add session history items must be
    // marked with AUTO_SUBFRAME. See also didFailProvisionalLoad for how we
    // handle loading of error pages.
    document_state->navigation_state()->set_transition_type(
        PAGE_TRANSITION_AUTO_SUBFRAME);
  }

  FOR_EACH_OBSERVER(
      RenderViewObserver, render_view_->observers(),
      DidStartProvisionalLoad(frame));

  Send(new FrameHostMsg_DidStartProvisionalLoadForFrame(
       routing_id_, frame->identifier(),
       frame->parent() ? frame->parent()->identifier() : -1,
       is_top_most, ds->request().url()));
}

void RenderFrameImpl::didReceiveServerRedirectForProvisionalLoad(
    WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. Needed state:
  // * page_id_
  render_view_->didReceiveServerRedirectForProvisionalLoad(frame);
}

void RenderFrameImpl::didFailProvisionalLoad(
    WebKit::WebFrame* frame,
    const WebKit::WebURLError& error) {
  // TODO(nasko): Move implementation here. Needed state:
  // * page_id_
  // * pending_navigation_params_
  // Needed methods
  // * MaybeLoadAlternateErrorPage
  // * LoadNavigationErrorPage
  render_view_->didFailProvisionalLoad(frame, error);
}

void RenderFrameImpl::didCommitProvisionalLoad(WebKit::WebFrame* frame,
                                               bool is_new_navigation) {
  // TODO(nasko): Move implementation here. Needed state:
  // * page_id_
  // * next_page_id_
  // * history_list_offset_
  // * history_list_length_
  // * history_page_ids_
  // Needed methods
  // * webview
  // * UpdateSessionHistory
  // * GetLoadingUrl
  render_view_->didCommitProvisionalLoad(frame, is_new_navigation);
}

void RenderFrameImpl::didClearWindowObject(WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. Needed state:
  // * enabled_bindings_
  // * dom_automation_controller_
  // * stats_collection_controller_
  render_view_->didClearWindowObject(frame);
}

void RenderFrameImpl::didCreateDocumentElement(WebKit::WebFrame* frame) {
  // Notify the browser about non-blank documents loading in the top frame.
  GURL url = frame->document().url();
  if (url.is_valid() && url.spec() != kAboutBlankURL) {
    // TODO(nasko): Check if webview()->mainFrame() is the same as the
    // frame->tree()->top().
    if (frame == render_view_->webview()->mainFrame()) {
      render_view_->Send(new ViewHostMsg_DocumentAvailableInMainFrame(
          render_view_->GetRoutingID()));
    }
  }

  // Call back to RenderViewImpl for observers to be notified.
  // TODO(nasko): Remove once we have RenderFrameObserver.
  render_view_->didCreateDocumentElement(frame);
}

void RenderFrameImpl::didReceiveTitle(WebKit::WebFrame* frame,
                                      const WebKit::WebString& title,
                                      WebKit::WebTextDirection direction) {
  // TODO(nasko): Investigate wheather implementation should move here.
  render_view_->didReceiveTitle(frame, title, direction);
}

void RenderFrameImpl::didChangeIcon(WebKit::WebFrame* frame,
                                    WebKit::WebIconURL::Type icon_type) {
  // TODO(nasko): Investigate wheather implementation should move here.
  render_view_->didChangeIcon(frame, icon_type);
}

void RenderFrameImpl::didFinishDocumentLoad(WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. No state needed, just observers
  // notification in before updating encoding.
  render_view_->didFinishDocumentLoad(frame);
}

void RenderFrameImpl::didHandleOnloadEvents(WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. Needed state:
  // * page_id_
  render_view_->didHandleOnloadEvents(frame);
}

void RenderFrameImpl::didFailLoad(WebKit::WebFrame* frame,
                                  const WebKit::WebURLError& error) {
  // TODO(nasko): Move implementation here. No state needed.
  render_view_->didFailLoad(frame, error);
}

void RenderFrameImpl::didFinishLoad(WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. No state needed, just observers
  // notification before sending message to the browser process.
  render_view_->didFinishLoad(frame);
}

void RenderFrameImpl::didNavigateWithinPage(WebKit::WebFrame* frame,
                                            bool is_new_navigation) {
  // TODO(nasko): Move implementation here. No state needed, just observers
  // notification before sending message to the browser process.
  render_view_->didNavigateWithinPage(frame, is_new_navigation);
}

void RenderFrameImpl::didUpdateCurrentHistoryItem(WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. Needed methods:
  // * StartNavStateSyncTimerIfNecessary
  render_view_->didUpdateCurrentHistoryItem(frame);
}

void RenderFrameImpl::willRequestAfterPreconnect(
    WebKit::WebFrame* frame,
    WebKit::WebURLRequest& request) {
  WebKit::WebReferrerPolicy referrer_policy = WebKit::WebReferrerPolicyDefault;
  WebString custom_user_agent;

  if (request.extraData()) {
    // This will only be called before willSendRequest, so only ExtraData
    // members we have to copy here is on WebURLRequestExtraDataImpl.
    webkit_glue::WebURLRequestExtraDataImpl* old_extra_data =
        static_cast<webkit_glue::WebURLRequestExtraDataImpl*>(
            request.extraData());

    referrer_policy = old_extra_data->referrer_policy();
    custom_user_agent = old_extra_data->custom_user_agent();
  }

  bool was_after_preconnect_request = true;
  // The args after |was_after_preconnect_request| are not used, and set to
  // correct values at |willSendRequest|.
  request.setExtraData(new webkit_glue::WebURLRequestExtraDataImpl(
      referrer_policy, custom_user_agent, was_after_preconnect_request));
}

void RenderFrameImpl::willSendRequest(
    WebKit::WebFrame* frame,
    unsigned identifier,
    WebKit::WebURLRequest& request,
    const WebKit::WebURLResponse& redirect_response) {
  // The request my be empty during tests.
  if (request.url().isEmpty())
    return;

  WebFrame* top_frame = frame->top();
  if (!top_frame)
    top_frame = frame;
  WebDataSource* provisional_data_source = top_frame->provisionalDataSource();
  WebDataSource* top_data_source = top_frame->dataSource();
  WebDataSource* data_source =
      provisional_data_source ? provisional_data_source : top_data_source;

  PageTransition transition_type = PAGE_TRANSITION_LINK;
  DocumentState* document_state = DocumentState::FromDataSource(data_source);
  DCHECK(document_state);
  InternalDocumentStateData* internal_data =
      InternalDocumentStateData::FromDocumentState(document_state);
  NavigationState* navigation_state = document_state->navigation_state();
  transition_type = navigation_state->transition_type();

  GURL request_url(request.url());
  GURL new_url;
  if (GetContentClient()->renderer()->WillSendRequest(
          frame,
          transition_type,
          request_url,
          request.firstPartyForCookies(),
          &new_url)) {
    request.setURL(WebURL(new_url));
  }

  if (internal_data->is_cache_policy_override_set())
    request.setCachePolicy(internal_data->cache_policy_override());

  WebKit::WebReferrerPolicy referrer_policy;
  if (internal_data->is_referrer_policy_set()) {
    referrer_policy = internal_data->referrer_policy();
    internal_data->clear_referrer_policy();
  } else {
    referrer_policy = frame->document().referrerPolicy();
  }

  // The request's extra data may indicate that we should set a custom user
  // agent. This needs to be done here, after WebKit is through with setting the
  // user agent on its own.
  WebString custom_user_agent;
  bool was_after_preconnect_request = false;
  if (request.extraData()) {
    webkit_glue::WebURLRequestExtraDataImpl* old_extra_data =
        static_cast<webkit_glue::WebURLRequestExtraDataImpl*>(
            request.extraData());
    custom_user_agent = old_extra_data->custom_user_agent();
    was_after_preconnect_request =
        old_extra_data->was_after_preconnect_request();

    if (!custom_user_agent.isNull()) {
      if (custom_user_agent.isEmpty())
        request.clearHTTPHeaderField("User-Agent");
      else
        request.setHTTPHeaderField("User-Agent", custom_user_agent);
    }
  }

  request.setExtraData(
      new RequestExtraData(referrer_policy,
                           custom_user_agent,
                           was_after_preconnect_request,
                           (frame == top_frame),
                           frame->identifier(),
                           GURL(frame->document().securityOrigin().toString()),
                           frame->parent() == top_frame,
                           frame->parent() ? frame->parent()->identifier() : -1,
                           navigation_state->allow_download(),
                           transition_type,
                           navigation_state->transferred_request_child_id(),
                           navigation_state->transferred_request_request_id()));

  DocumentState* top_document_state =
      DocumentState::FromDataSource(top_data_source);
  if (top_document_state) {
    // TODO(gavinp): separate out prefetching and prerender field trials
    // if the rel=prerender rel type is sticking around.
    if (request.targetType() == WebURLRequest::TargetIsPrefetch)
      top_document_state->set_was_prefetcher(true);

    if (was_after_preconnect_request)
      top_document_state->set_was_after_preconnect_request(true);
  }

  // This is an instance where we embed a copy of the routing id
  // into the data portion of the message. This can cause problems if we
  // don't register this id on the browser side, since the download manager
  // expects to find a RenderViewHost based off the id.
  request.setRequestorID(render_view_->GetRoutingID());
  request.setHasUserGesture(WebUserGestureIndicator::isProcessingUserGesture());

  if (!navigation_state->extra_headers().empty()) {
    for (net::HttpUtil::HeadersIterator i(
        navigation_state->extra_headers().begin(),
        navigation_state->extra_headers().end(), "\n");
        i.GetNext(); ) {
      request.setHTTPHeaderField(WebString::fromUTF8(i.name()),
                                 WebString::fromUTF8(i.values()));
    }
  }

  if (!render_view_->renderer_preferences_.enable_referrers)
    request.clearHTTPHeaderField("Referer");
}

void RenderFrameImpl::didReceiveResponse(
    WebKit::WebFrame* frame,
    unsigned identifier,
    const WebKit::WebURLResponse& response) {
  // Only do this for responses that correspond to a provisional data source
  // of the top-most frame.  If we have a provisional data source, then we
  // can't have any sub-resources yet, so we know that this response must
  // correspond to a frame load.
  if (!frame->provisionalDataSource() || frame->parent())
    return;

  // If we are in view source mode, then just let the user see the source of
  // the server's error page.
  if (frame->isViewSourceModeEnabled())
    return;

  DocumentState* document_state =
      DocumentState::FromDataSource(frame->provisionalDataSource());
  int http_status_code = response.httpStatusCode();

  // Record page load flags.
  WebURLResponseExtraDataImpl* extra_data =
      RenderViewImpl::GetExtraDataFromResponse(response);
  if (extra_data) {
    document_state->set_was_fetched_via_spdy(
        extra_data->was_fetched_via_spdy());
    document_state->set_was_npn_negotiated(
        extra_data->was_npn_negotiated());
    document_state->set_npn_negotiated_protocol(
        extra_data->npn_negotiated_protocol());
    document_state->set_was_alternate_protocol_available(
        extra_data->was_alternate_protocol_available());
    document_state->set_connection_info(
        extra_data->connection_info());
    document_state->set_was_fetched_via_proxy(
        extra_data->was_fetched_via_proxy());
  }
  InternalDocumentStateData* internal_data =
      InternalDocumentStateData::FromDocumentState(document_state);
  internal_data->set_http_status_code(http_status_code);
  // Whether or not the http status code actually corresponds to an error is
  // only checked when the page is done loading, if |use_error_page| is
  // still true.
  internal_data->set_use_error_page(true);
}

void RenderFrameImpl::didFinishResourceLoad(WebKit::WebFrame* frame,
                                            unsigned identifier) {
  // TODO(nasko): Move implementation here. Needed state:
  // * devtools_agent_
  // Needed methods:
  // * LoadNavigationErrorPage
  render_view_->didFinishResourceLoad(frame, identifier);
}

void RenderFrameImpl::didLoadResourceFromMemoryCache(
    WebKit::WebFrame* frame,
    const WebKit::WebURLRequest& request,
    const WebKit::WebURLResponse& response) {
  // The recipients of this message have no use for data: URLs: they don't
  // affect the page's insecure content list and are not in the disk cache. To
  // prevent large (1M+) data: URLs from crashing in the IPC system, we simply
  // filter them out here.
  GURL url(request.url());
  if (url.SchemeIs("data"))
    return;

  // Let the browser know we loaded a resource from the memory cache.  This
  // message is needed to display the correct SSL indicators.
  render_view_->Send(new ViewHostMsg_DidLoadResourceFromMemoryCache(
      render_view_->GetRoutingID(),
      url,
      response.securityInfo(),
      request.httpMethod().utf8(),
      response.mimeType().utf8(),
      ResourceType::FromTargetType(request.targetType())));
}

void RenderFrameImpl::didDisplayInsecureContent(WebKit::WebFrame* frame) {
  render_view_->Send(new ViewHostMsg_DidDisplayInsecureContent(
      render_view_->GetRoutingID()));
}

void RenderFrameImpl::didRunInsecureContent(
    WebKit::WebFrame* frame,
    const WebKit::WebSecurityOrigin& origin,
    const WebKit::WebURL& target) {
  render_view_->Send(new ViewHostMsg_DidRunInsecureContent(
      render_view_->GetRoutingID(),
      origin.toString().utf8(),
      target));
}

void RenderFrameImpl::didAbortLoading(WebKit::WebFrame* frame) {
#if defined(ENABLE_PLUGINS)
  if (frame != render_view_->webview()->mainFrame())
    return;
  PluginChannelHost::Broadcast(
      new PluginHostMsg_DidAbortLoading(render_view_->GetRoutingID()));
#endif
}

void RenderFrameImpl::didExhaustMemoryAvailableForScript(
    WebKit::WebFrame* frame) {
  render_view_->Send(new ViewHostMsg_JSOutOfMemory(
      render_view_->GetRoutingID()));
}

void RenderFrameImpl::didCreateScriptContext(WebKit::WebFrame* frame,
                                             v8::Handle<v8::Context> context,
                                             int extension_group,
                                             int world_id) {
  GetContentClient()->renderer()->DidCreateScriptContext(
      frame, context, extension_group, world_id);
}

void RenderFrameImpl::willReleaseScriptContext(WebKit::WebFrame* frame,
                                               v8::Handle<v8::Context> context,
                                               int world_id) {
  GetContentClient()->renderer()->WillReleaseScriptContext(
      frame, context, world_id);
}

void RenderFrameImpl::didFirstVisuallyNonEmptyLayout(WebKit::WebFrame* frame) {
  render_view_->didFirstVisuallyNonEmptyLayout(frame);
}

void RenderFrameImpl::didChangeContentsSize(WebKit::WebFrame* frame,
                                            const WebKit::WebSize& size) {
  // TODO(nasko): Move implementation here. Needed state:
  // * cached_has_main_frame_horizontal_scrollbar_
  // * cached_has_main_frame_vertical_scrollbar_
  render_view_->didChangeContentsSize(frame, size);
}

void RenderFrameImpl::didChangeScrollOffset(WebKit::WebFrame* frame) {
  // TODO(nasko): Move implementation here. Needed methods:
  // * StartNavStateSyncTimerIfNecessary
  render_view_->didChangeScrollOffset(frame);
}

void RenderFrameImpl::willInsertBody(WebKit::WebFrame* frame) {
  if (!frame->parent()) {
    render_view_->Send(new ViewHostMsg_WillInsertBody(
        render_view_->GetRoutingID()));
  }
}

void RenderFrameImpl::reportFindInPageMatchCount(int request_id,
                                                 int count,
                                                 bool final_update) {
  int active_match_ordinal = -1;  // -1 = don't update active match ordinal
  if (!count)
    active_match_ordinal = 0;

  render_view_->Send(new ViewHostMsg_Find_Reply(
      render_view_->GetRoutingID(), request_id, count,
      gfx::Rect(), active_match_ordinal, final_update));
}

void RenderFrameImpl::reportFindInPageSelection(
    int request_id,
    int active_match_ordinal,
    const WebKit::WebRect& selection_rect) {
  render_view_->Send(new ViewHostMsg_Find_Reply(
      render_view_->GetRoutingID(), request_id, -1, selection_rect,
      active_match_ordinal, false));
}

void RenderFrameImpl::requestStorageQuota(
    WebKit::WebFrame* frame,
    WebKit::WebStorageQuotaType type,
    unsigned long long requested_size,
    WebKit::WebStorageQuotaCallbacks* callbacks) {
  DCHECK(frame);
  WebSecurityOrigin origin = frame->document().securityOrigin();
  if (origin.isUnique()) {
    // Unique origins cannot store persistent state.
    callbacks->didFail(WebKit::WebStorageQuotaErrorAbort);
    return;
  }
  ChildThread::current()->quota_dispatcher()->RequestStorageQuota(
      render_view_->GetRoutingID(), GURL(origin.toString()),
      static_cast<quota::StorageType>(type), requested_size,
      QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
}

void RenderFrameImpl::willOpenSocketStream(
    WebKit::WebSocketStreamHandle* handle) {
  SocketStreamHandleData::AddToHandle(handle, render_view_->GetRoutingID());
}

void RenderFrameImpl::willStartUsingPeerConnectionHandler(
    WebKit::WebFrame* frame,
    WebKit::WebRTCPeerConnectionHandler* handler) {
#if defined(ENABLE_WEBRTC)
  static_cast<RTCPeerConnectionHandler*>(handler)->associateWithFrame(frame);
#endif
}

bool RenderFrameImpl::willCheckAndDispatchMessageEvent(
    WebKit::WebFrame* sourceFrame,
    WebKit::WebFrame* targetFrame,
    WebKit::WebSecurityOrigin targetOrigin,
    WebKit::WebDOMMessageEvent event) {
  // TODO(nasko): Move implementation here. Needed state:
  // * is_swapped_out_
  return render_view_->willCheckAndDispatchMessageEvent(
      sourceFrame, targetFrame, targetOrigin, event);
}

WebKit::WebString RenderFrameImpl::userAgentOverride(
    WebKit::WebFrame* frame,
    const WebKit::WebURL& url) {
  if (!render_view_->webview() || !render_view_->webview()->mainFrame() ||
      render_view_->renderer_preferences_.user_agent_override.empty()) {
    return WebKit::WebString();
  }

  // If we're in the middle of committing a load, the data source we need
  // will still be provisional.
  WebFrame* main_frame = render_view_->webview()->mainFrame();
  WebDataSource* data_source = NULL;
  if (main_frame->provisionalDataSource())
    data_source = main_frame->provisionalDataSource();
  else
    data_source = main_frame->dataSource();

  InternalDocumentStateData* internal_data = data_source ?
      InternalDocumentStateData::FromDataSource(data_source) : NULL;
  if (internal_data && internal_data->is_overriding_user_agent())
    return WebString::fromUTF8(
        render_view_->renderer_preferences_.user_agent_override);
  return WebKit::WebString();
}

WebKit::WebString RenderFrameImpl::doNotTrackValue(WebKit::WebFrame* frame) {
  if (render_view_->renderer_preferences_.enable_do_not_track)
    return WebString::fromUTF8("1");
  return WebString();
}

bool RenderFrameImpl::allowWebGL(WebKit::WebFrame* frame, bool default_value) {
  if (!default_value)
    return false;

  bool blocked = true;
  render_view_->Send(new ViewHostMsg_Are3DAPIsBlocked(
      render_view_->GetRoutingID(),
      GURL(frame->top()->document().securityOrigin().toString()),
      THREE_D_API_TYPE_WEBGL,
      &blocked));
  return !blocked;
}

void RenderFrameImpl::didLoseWebGLContext(WebKit::WebFrame* frame,
                                          int arb_robustness_status_code) {
  render_view_->Send(new ViewHostMsg_DidLose3DContext(
      GURL(frame->top()->document().securityOrigin().toString()),
      THREE_D_API_TYPE_WEBGL,
      arb_robustness_status_code));
}

}  // namespace content