Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

content/renderer/stats_collection_controller.cc

Index: content/renderer/stats_collection_controller.cc
diff --git a/content/renderer/stats_collection_controller.cc b/content/renderer/stats_collection_controller.cc
index 618c6fc0c4e8a9a7e79e8d09886e005066c731ab..16eb0f83a70f6724c4d1a34338848cdf2d7ad70d 100644
--- a/content/renderer/stats_collection_controller.cc
+++ b/content/renderer/stats_collection_controller.cc
@@ -78,7 +78,7 @@ gin::WrapperInfo StatsCollectionController::kWrapperInfo = {
 };
 
 // static
-void StatsCollectionController::Install(blink::WebFrame* frame) {
+void StatsCollectionController::Install(blink::WebLocalFrame* frame) {
   v8::Isolate* isolate = blink::MainThreadIsolate();
   v8::HandleScope handle_scope(isolate);
   v8::Local<v8::Context> context = frame->MainWorldScriptContext();