Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

content/shell/test_runner/web_ax_object_proxy.cc

Index: content/shell/test_runner/web_ax_object_proxy.cc
diff --git a/content/shell/test_runner/web_ax_object_proxy.cc b/content/shell/test_runner/web_ax_object_proxy.cc
index 5ae5dd7e0bec921f0193305b655e3dcc31d73c88..65f5241477818f23ad893355a65f6f730cd33fc0 100644
--- a/content/shell/test_runner/web_ax_object_proxy.cc
+++ b/content/shell/test_runner/web_ax_object_proxy.cc
@@ -13,8 +13,8 @@
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebString.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 "third_party/skia/include/core/SkMatrix44.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/transform.h"
@@ -742,7 +742,7 @@ bool WebAXObjectProxy::IsEqualToObject(const blink::WebAXObject& other) {
 }
 
 void WebAXObjectProxy::NotificationReceived(
-    blink::WebFrame* frame,
+    blink::WebLocalFrame* frame,
     const std::string& notification_name) {
   if (notification_callback_.IsEmpty())
     return;