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 df6e9cd4aa1ce3853b575e82d99ced795d8c007f..be7c8b97cce1e6f2a5feafa57a9034987a76d597 100644
--- a/extensions/renderer/dispatcher.cc
+++ b/extensions/renderer/dispatcher.cc
@@ -751,8 +751,6 @@ 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));
@@ -1645,10 +1643,6 @@ 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 &&