Move out DidStartProvisionalLoad from WebContentsImpl into Navigator.

content/browser/frame_host/navigator_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/navigator_impl.h"
 
+#include "content/browser/frame_host/frame_tree_node.h"
+#include "content/browser/frame_host/navigation_controller_impl.h"
+#include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/frame_host/navigator_delegate.h"
+#include "content/browser/frame_host/render_frame_host_impl.h"
+#include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/site_instance_impl.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/invalidate_type.h"
+#include "content/public/browser/navigation_controller.h"
+#include "content/public/browser/render_view_host.h"
+#include "content/public/common/url_constants.h"
 
 namespace content {
 
 NavigatorImpl::NavigatorImpl(
     NavigationControllerImpl* navigation_controller,
-    NavigatorDelegate* delegate) {
+    NavigatorDelegate* delegate)
+    : controller_(navigation_controller),
+      delegate_(delegate) {
+}
+
+void NavigatorImpl::DidStartProvisionalLoad(
+    RenderFrameHostImpl* render_frame_host,
+    int64 frame_id,
+    int64 parent_frame_id,
+    bool is_main_frame,
+    const GURL& url) {
+  bool is_error_page = (url.spec() == kUnreachableWebDataURL);
+  bool is_iframe_srcdoc = (url.spec() == kAboutSrcDocURL);
+  GURL validated_url(url);
+  RenderProcessHost* render_process_host = render_frame_host->GetProcess();
+  RenderViewHost::FilterURL(render_process_host, false, &validated_url);
+
+  if (is_main_frame) {
+    // If there is no browser-initiated pending entry for this navigation and it
+    // is not for the error URL, create a pending entry using the current
+    // SiteInstance, and ensure the address bar updates accordingly.  We don't
+    // know the referrer or extra headers at this point, but the referrer will
+    // be set properly upon commit.
+    NavigationEntryImpl* pending_entry =
+        NavigationEntryImpl::FromNavigationEntry(
+            controller_->GetPendingEntry());
+    bool has_browser_initiated_pending_entry = pending_entry &&
+        !pending_entry->is_renderer_initiated();
+    if (!has_browser_initiated_pending_entry && !is_error_page) {
+      NavigationEntryImpl* entry = NavigationEntryImpl::FromNavigationEntry(
+          controller_->CreateNavigationEntry(validated_url,
+                                             content::Referrer(),
+                                             content::PAGE_TRANSITION_LINK,
+                                             true /* is_renderer_initiated */,
+                                             std::string(),
+                                             controller_->GetBrowserContext()));
+      entry->set_site_instance(
+          static_cast<SiteInstanceImpl*>(
+              render_frame_host->render_view_host()->GetSiteInstance()));
+      // TODO(creis): If there's a pending entry already, find a safe way to
+      // update it instead of replacing it and copying over things like this.
+      if (pending_entry) {
+        entry->set_transferred_global_request_id(
+            pending_entry->transferred_global_request_id());
+        entry->set_should_replace_entry(pending_entry->should_replace_entry());
+        entry->set_redirect_chain(pending_entry->redirect_chain());
+      }
+      controller_->SetPendingEntry(entry);
+      if (delegate_)
+        delegate_->NotifyChangedNavigationState(content::INVALIDATE_TYPE_URL);
+    }
+  }
+
+  if (delegate_) {
+    // Notify the observer about the start of the provisional load.
+    delegate_->DidStartProvisionalLoad(
+        render_frame_host, frame_id, parent_frame_id, is_main_frame,
+        validated_url, is_error_page, is_iframe_srcdoc);
+  }
 }
 
 }  // namespace content