Make WebUI webview content script work with incognito.

extensions/browser/api/guest_view/web_view/web_view_internal_api.cc

Index: extensions/browser/api/guest_view/web_view/web_view_internal_api.cc
diff --git a/extensions/browser/api/guest_view/web_view/web_view_internal_api.cc b/extensions/browser/api/guest_view/web_view/web_view_internal_api.cc
index dc116905a801f00c131b5da139c888a1b1be8469..a56ce4d84470f815e77cb86b9234e5c6a9c13318 100644
--- a/extensions/browser/api/guest_view/web_view/web_view_internal_api.cc
+++ b/extensions/browser/api/guest_view/web_view/web_view_internal_api.cc
@@ -7,6 +7,7 @@
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/public/browser/browser_context.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
@@ -191,6 +192,7 @@ bool Parse(const ContentScriptDetails& script_value,
 bool Parse(std::vector<linked_ptr<ContentScriptDetails>> content_script_list,
            const extensions::Extension* extension,
            const GURL& owner_base_url,
+           bool is_incognito_enabled,
            std::map<std::string, UserScript>* result,
            std::string* error) {
   if (content_script_list.size() == 0)
@@ -201,8 +203,10 @@ bool Parse(std::vector<linked_ptr<ContentScriptDetails>> content_script_list,
     UserScript script;
     if (!Parse(script_value, extension, owner_base_url, &script, error))
       return false;
-    else
+    else {
+      script.set_incognito_enabled(is_incognito_enabled);
       result->insert(std::pair<std::string, UserScript>(name, script));
+    }
   }
   return true;
 }
@@ -391,11 +395,13 @@ bool WebViewInternalAddContentScriptsFunction::RunAsync() {
     return false;
   }
 
+  const bool is_incognito_enabled = browser_context()->IsOffTheRecord();
+
   GURL owner_base_url(
       render_view_host()->GetSiteInstance()->GetSiteURL().GetWithEmptyPath());
   std::map<std::string, UserScript> result;
-  if (!Parse(params->content_script_list, extension(), owner_base_url, &result,
-             &error_)) {
+  if (!Parse(params->content_script_list, extension(), owner_base_url,
+             is_incognito_enabled, &result, &error_)) {
     SendResponse(false);
     return false;
   }