Remove iframe@seamless

Source/core/loader/FrameLoader.cpp

Index: Source/core/loader/FrameLoader.cpp
diff --git a/Source/core/loader/FrameLoader.cpp b/Source/core/loader/FrameLoader.cpp
index 1206396eec279863eb36c21d17e0112ac34e173d..3fe1cab2c652be5c85052271f63c5dd4d34264e9 100644
--- a/Source/core/loader/FrameLoader.cpp
+++ b/Source/core/loader/FrameLoader.cpp
@@ -1399,26 +1399,6 @@ Frame* FrameLoader::findFrameForNavigation(const AtomicString& name, Document* a
 {
     ASSERT(activeDocument);
     Frame* frame = m_frame->tree().find(name);
-
-    // From http://www.whatwg.org/specs/web-apps/current-work/#seamlessLinks:
-    //
-    // If the source browsing context is the same as the browsing context
-    // being navigated, and this browsing context has its seamless browsing
-    // context flag set, and the browsing context being navigated was not
-    // chosen using an explicit self-navigation override, then find the
-    // nearest ancestor browsing context that does not have its seamless
-    // browsing context flag set, and continue these steps as if that
-    // browsing context was the one that was going to be navigated instead.
-    if (frame == m_frame && name != "_self" && m_frame->document()->shouldDisplaySeamlesslyWithParent()) {
-        for (Frame* ancestor = m_frame; ancestor; ancestor = ancestor->tree().parent()) {
-            if (!ancestor->document()->shouldDisplaySeamlesslyWithParent()) {
-                frame = ancestor;
-                break;
-            }
-        }
-        ASSERT(frame != m_frame);
-    }
-
     if (!activeDocument->canNavigate(frame))
         return 0;
     return frame;