Remove a bunch of provisionalDataSource() usage.

chrome/renderer/net/net_error_helper.cc

Index: chrome/renderer/net/net_error_helper.cc
diff --git a/chrome/renderer/net/net_error_helper.cc b/chrome/renderer/net/net_error_helper.cc
index 84f55e9b71686698220fdaaef1294e1ac5f4d42a..8a0ef97d555d04715599b56d7ade5e3f741a7d90 100644
--- a/chrome/renderer/net/net_error_helper.cc
+++ b/chrome/renderer/net/net_error_helper.cc
@@ -57,8 +57,9 @@ namespace {
 // suggestions.  If it takes too long, just use the local error page.
 const int kNavigationCorrectionFetchTimeoutSec = 3;
 
-NetErrorHelperCore::PageType GetLoadingPageType(const blink::WebFrame* frame) {
-  GURL url = frame->provisionalDataSource()->request().url();
+NetErrorHelperCore::PageType GetLoadingPageType(
+    const blink::WebDataSource* datasource) {
+  GURL url = datasource->request().url();
   if (!url.is_valid() || url.spec() != kUnreachableWebDataURL)
     return NetErrorHelperCore::NON_ERROR_PAGE;
   return NetErrorHelperCore::ERROR_PAGE;
@@ -101,9 +102,9 @@ void NetErrorHelper::TrackClick(int tracking_id) {
   core_->TrackClick(tracking_id);
 }
 
-void NetErrorHelper::DidStartProvisionalLoad() {
+void NetErrorHelper::DidStartProvisionalLoad(blink::WebDataSource* datasource) {
   blink::WebFrame* frame = render_frame()->GetWebFrame();
-  core_->OnStartLoad(GetFrameType(frame), GetLoadingPageType(frame));
+  core_->OnStartLoad(GetFrameType(frame), GetLoadingPageType(datasource));
 }
 
 void NetErrorHelper::DidCommitProvisionalLoad(bool is_new_navigation,