Move WebView.captureVisibleRegion to stable API.

extensions/renderer/dispatcher.cc

Index: extensions/renderer/dispatcher.cc
diff --git a/extensions/renderer/dispatcher.cc b/extensions/renderer/dispatcher.cc
index e83c89798c7460721e0065dffaa92c8ec40ac9a2..27979f922e75cd6199efcf077c8a6d43b2e94bf3 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -752,8 +752,6 @@ std::vector<std::pair<std::string, int> > Dispatcher::GetJsResources() {
   resources.push_back(std::make_pair("webViewInternal",
                                      IDR_WEB_VIEW_INTERNAL_CUSTOM_BINDINGS_JS));
   resources.push_back(
-      std::make_pair("webViewExperimental", IDR_WEB_VIEW_EXPERIMENTAL_JS));
-  resources.push_back(
       std::make_pair(mojo::kBindingsModuleName, IDR_MOJO_BINDINGS_JS));
   resources.push_back(
       std::make_pair(mojo::kBufferModuleName, IDR_MOJO_BUFFER_JS));
@@ -1658,10 +1656,6 @@ void Dispatcher::RequireGuestViewModules(ScriptContext* context) {
     module_system->Require("webView");
     module_system->Require("webViewApiMethods");
     module_system->Require("webViewAttributes");
-    if (context->GetAvailability("webViewExperimentalInternal")
-            .is_available()) {
-      module_system->Require("webViewExperimental");
-    }
   }
 
   if (requires_guest_view_module &&