Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

content/shell/test_runner/gc_controller.cc

Index: content/shell/test_runner/gc_controller.cc
diff --git a/content/shell/test_runner/gc_controller.cc b/content/shell/test_runner/gc_controller.cc
index a84ff83451a58386d3d477dd69ec35286be46291..93f9be6c545f7b9dbb0591fd6808a1c04199aa58 100644
--- a/content/shell/test_runner/gc_controller.cc
+++ b/content/shell/test_runner/gc_controller.cc
@@ -7,8 +7,8 @@
 #include "gin/arguments.h"
 #include "gin/handle.h"
 #include "gin/object_template_builder.h"
-#include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/WebKit/public/web/WebKit.h"
+#include "third_party/WebKit/public/web/WebLocalFrame.h"
 #include "v8/include/v8.h"
 
 namespace test_runner {
@@ -16,7 +16,7 @@ namespace test_runner {
 gin::WrapperInfo GCController::kWrapperInfo = {gin::kEmbedderNativeGin};
 
 // static
-void GCController::Install(blink::WebFrame* frame) {
+void GCController::Install(blink::WebLocalFrame* frame) {
   v8::Isolate* isolate = blink::MainThreadIsolate();
   v8::HandleScope handle_scope(isolate);
   v8::Local<v8::Context> context = frame->MainWorldScriptContext();