Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

content/renderer/skia_benchmarking_extension.h

Index: content/renderer/skia_benchmarking_extension.h
diff --git a/content/renderer/skia_benchmarking_extension.h b/content/renderer/skia_benchmarking_extension.h
index 8dd05dd533067283446644df4ffd84882748be24..43bfbfbbb13730f88ddbd21c2d6f203c04e26b6a 100644
--- a/content/renderer/skia_benchmarking_extension.h
+++ b/content/renderer/skia_benchmarking_extension.h
@@ -9,7 +9,7 @@
 #include "gin/wrappable.h"
 
 namespace blink {
-class WebFrame;
+class WebLocalFrame;
 }
 
 namespace gin {
@@ -21,7 +21,7 @@ namespace content {
 class SkiaBenchmarking : public gin::Wrappable<SkiaBenchmarking> {
  public:
   static gin::WrapperInfo kWrapperInfo;
-  static void Install(blink::WebFrame* frame);
+  static void Install(blink::WebLocalFrame* frame);
 
   // Wrapper around SkGraphics::Init that can be invoked multiple times.
   static void Initialize();