Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

BUG=416660

Review-Url: https://codereview.chromium.org/2923053002
Cr-Commit-Position: refs/heads/master@{#478436}
diff --git a/content/renderer/stats_collection_controller.cc b/content/renderer/stats_collection_controller.cc
index 618c6fc..16eb0f83 100644
--- a/content/renderer/stats_collection_controller.cc
+++ b/content/renderer/stats_collection_controller.cc
@@ -78,7 +78,7 @@
 };
 
 // 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();