Block renderer-initiated main frame navigations to data URLs

chrome/browser/tab_contents/navigation_metrics_recorder.cc

Index: chrome/browser/tab_contents/navigation_metrics_recorder.cc
diff --git a/chrome/browser/tab_contents/navigation_metrics_recorder.cc b/chrome/browser/tab_contents/navigation_metrics_recorder.cc
index 1152f0b3397eced7ebddf97e461d55700179eb90..a7b40faaef812daa0a466a6d0cee2ab099814411 100644
--- a/chrome/browser/tab_contents/navigation_metrics_recorder.cc
+++ b/chrome/browser/tab_contents/navigation_metrics_recorder.cc
@@ -95,6 +95,7 @@ void NavigationMetricsRecorder::DidFinishNavigation(
       !ui::PageTransitionCoreTypeIs(navigation_handle->GetPageTransition(),
                                     ui::PAGE_TRANSITION_TYPED)) {
     if (!navigation_handle->GetPreviousURL().is_empty()) {
+      // TODO(meacer): Remove once data URL navigations are blocked.
       rappor::SampleDomainAndRegistryFromGURL(
           rappor_service_, "Navigation.Scheme.Data",
           navigation_handle->GetPreviousURL());
@@ -103,6 +104,7 @@ void NavigationMetricsRecorder::DidFinishNavigation(
     // Also record the mime type of the data: URL.
     std::string mime_type;
     std::string charset;
+    // TODO(meacer): Remove once data URL navigations are blocked.
     if (net::DataURL::Parse(last_committed_entry->GetVirtualURL(), &mime_type,
                             &charset, nullptr)) {
       RecordDataURLMimeType(mime_type);