Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

third_party/WebKit/public/web/WebFrame.h

Index: third_party/WebKit/public/web/WebFrame.h
diff --git a/third_party/WebKit/public/web/WebFrame.h b/third_party/WebKit/public/web/WebFrame.h
index 47e76e1e694a666370e76a7be8cec9e3021199c0..a5446a9dd401f45fa08d6b47a229b4e169660131 100644
--- a/third_party/WebKit/public/web/WebFrame.h
+++ b/third_party/WebKit/public/web/WebFrame.h
@@ -41,7 +41,6 @@
 #include "public/web/WebTreeScopeType.h"
 
 namespace v8 {
-class Context;
 class Function;
 class Value;
 template <class T>
@@ -277,13 +276,6 @@ class WebFrame {
       int argc,
       v8::Local<v8::Value> argv[]) = 0;
 
-  // Returns the V8 context for associated with the main world and this
-  // frame. There can be many V8 contexts associated with this frame, one for
-  // each isolated world and one for the main world. If you don't know what
-  // the "main world" or an "isolated world" is, then you probably shouldn't
-  // be calling this API.
-  virtual v8::Local<v8::Context> MainWorldScriptContext() const = 0;
-
   // Returns true if the WebFrame currently executing JavaScript has access
   // to the given WebFrame, or false otherwise.
   BLINK_EXPORT static bool ScriptCanAccess(WebFrame*);