Split WebLocalFrame into a distinct subclass of WebFrame.

public/web/WebFrame.h

Index: public/web/WebFrame.h
diff --git a/public/web/WebFrame.h b/public/web/WebFrame.h
index 1f84dce8e926dadc27f53b3305567cfa244102cf..bda2d597a52889f2b06e04598db36dbf719d7690 100644
--- a/public/web/WebFrame.h
+++ b/public/web/WebFrame.h
@@ -63,6 +63,7 @@ class WebFormElement;
 class WebFrameClient;
 class WebInputElement;
 class WebLayer;
+class WebLocalFrame;
 class WebPerformance;
 class WebPermissionClient;
 class WebRange;
@@ -86,8 +87,12 @@ struct WebURLLoaderOptions;
 
 template <typename T> class WebVector;
 
-typedef class WebFrame WebLocalFrame;
-
+// Frames may be rendered in process ('local') or out of process ('remote').
+// A remote frame is always cross-site; a local frame may be either same-site or
+// cross-site.
+// WebFrame is the base class for both WebLocalFrame and WebRemoteFrame and
+// contains methods that are valid on both local and remote frames, such as
+// getting a frame's parent or its opener.
 class WebFrame {
 public:
     // Control of renderTreeAsText output
@@ -98,27 +103,9 @@ public:
     };
     typedef unsigned RenderAsTextControls;
 
-    // Creates a WebFrame. Delete this WebFrame by calling WebFrame::close().
-    // It is valid to pass a null client pointer.
-    BLINK_EXPORT static WebLocalFrame* create(WebFrameClient*);
-
     // Returns the number of live WebFrame objects, used for leak checking.
     BLINK_EXPORT static int instanceCount();
 
-    // Returns the WebFrame associated with the current V8 context. This
-    // function can return 0 if the context is associated with a Document that
-    // is not currently being displayed in a Frame.
-    BLINK_EXPORT static WebLocalFrame* frameForCurrentContext();
-
-    // Returns the frame corresponding to the given context. This can return 0
-    // if the context is detached from the frame, or if the context doesn't
-    // correspond to a frame (e.g., workers).
-    BLINK_EXPORT static WebLocalFrame* frameForContext(v8::Handle<v8::Context>);
-
-    // Returns the frame inside a given frame or iframe element. Returns 0 if
-    // the given element is not a frame, iframe or if the frame is empty.
-    BLINK_EXPORT static WebLocalFrame* fromFrameOwnerElement(const WebElement&);
-
     virtual WebLocalFrame* toWebLocalFrame() = 0;
 
     // This method closes and deletes the WebFrame.