Allow view-source of pages fully-blocked by Blink's XSS filter.

chrome/browser/ui/browser_commands.cc

Index: chrome/browser/ui/browser_commands.cc
diff --git a/chrome/browser/ui/browser_commands.cc b/chrome/browser/ui/browser_commands.cc
index e2225bac044e306c1e8450572c8abddec57518b6..43e13e01699588b5ad58399708010ebdf85ff69f 100644
--- a/chrome/browser/ui/browser_commands.cc
+++ b/chrome/browser/ui/browser_commands.cc
@@ -1144,6 +1144,19 @@ void ViewSource(Browser* browser, WebContents* contents) {
   if (!entry)
     return;
 
+  // If blink sent us to its blocked-page URL, show the source of the previous
+  // page (which generated the block) instead.
+  if (entry->GetURL() == GURL("data:,Blocked")) {
+    NavigationEntry* previous = contents->GetController().GetEntryAtOffset(-1);
+    if (previous) {
+      base::string16 value;
+      if (previous->GetExtraData("XSSDetected", &value) &&
+          value == base::ASCIIToUTF16("1")) {
+        entry = previous;
+      }
+    }
+  }
+
   ViewSource(browser, contents, entry->GetURL(), entry->GetPageState());
 }