Take 2 at implementing activeTab.

chrome/browser/extensions/extension_tabs_module.cc

Index: chrome/browser/extensions/extension_tabs_module.cc
diff --git a/chrome/browser/extensions/extension_tabs_module.cc b/chrome/browser/extensions/extension_tabs_module.cc
index af88edfc489825b66539c88d83f6fab14aab0478..8444e07c9b52df2ddc97b2ccafd4730f9ed2beb0 100644
--- a/chrome/browser/extensions/extension_tabs_module.cc
+++ b/chrome/browser/extensions/extension_tabs_module.cc
@@ -1223,7 +1223,7 @@ bool UpdateTabFunction::RunImpl() {
 
   // Navigate the tab to a new location if the url is different.
   bool is_async = false;
-  if (!UpdateURLIfPresent(update_props, &is_async))
+  if (!UpdateURLIfPresent(update_props, tab_id, &is_async))
     return false;
 
   bool active = false;
@@ -1287,6 +1287,7 @@ bool UpdateTabFunction::RunImpl() {
 }
 
 bool UpdateTabFunction::UpdateURLIfPresent(DictionaryValue* update_props,
+                                           int tab_id,
                                            bool* is_async) {
   if (!update_props->HasKey(keys::kUrlKey))
     return true;
@@ -1313,7 +1314,7 @@ bool UpdateTabFunction::UpdateURLIfPresent(DictionaryValue* update_props,
   // we need to check host permissions before allowing them.
   if (url.SchemeIs(chrome::kJavaScriptScheme)) {
     if (!GetExtension()->CanExecuteScriptOnPage(
-            tab_contents_->web_contents()->GetURL(), NULL, &error_)) {
+            tab_contents_->web_contents()->GetURL(), tab_id, NULL, &error_)) {
       return false;
     }
 
@@ -1626,8 +1627,12 @@ bool CaptureVisibleTabFunction::RunImpl() {
   // captureVisibleTab() can return an image containing sensitive information
   // that the browser would otherwise protect.  Ensure the extension has
   // permission to do this.
-  if (!GetExtension()->CanCaptureVisiblePage(web_contents->GetURL(), &error_))
+  if (!GetExtension()->CanCaptureVisiblePage(
+        web_contents->GetURL(),
+        wrapper->extension_tab_helper()->GetTabId(),
+        &error_)) {
     return false;
+  }
 
   RenderViewHost* render_view_host = web_contents->GetRenderViewHost();
   content::RenderWidgetHostView* view = render_view_host->GetView();