Bug 334547: get rid of scrollframe code which never executes. r+sr=roc.

layout/base/nsCSSFrameConstructor.cpp

@@ -4569,30 +4569,10 @@ nsCSSFrameConstructor::ConstructDocElementFrame(nsFrameConstructorState& aState,
   PRBool propagatedScrollToViewport =
     PropagateScrollToViewport() == aDocElement;
 
-  // The document root should not be scrollable in any paginated context,
-  // even in print preview.
-  PRBool isScrollable = display->IsScrollableOverflow()
-    && !aState.mPresContext->IsPaginated()
-    && !propagatedScrollToViewport;
-
-  nsIFrame* scrollFrame = nsnull;
-
-  // build a scrollframe
-  if (isScrollable) {
-    nsRefPtr<nsStyleContext> newContext;
-
-    newContext = BeginBuildingScrollFrame( aState,
-                                           aDocElement,
-                                           styleContext,
-                                           aParentFrame,
-                                           nsnull,
-                                           nsCSSAnonBoxes::scrolledContent,
-                                           PR_FALSE,
-                                           scrollFrame);
-
-    styleContext = newContext;
-    aParentFrame = scrollFrame;
-  }
+  NS_ASSERTION(!display->IsScrollableOverflow() || 
+               aState.mPresContext->IsPaginated() ||
+               propagatedScrollToViewport,
+               "Scrollbars should have been propagated to the viewport");
 
   nsIFrame* contentFrame = nsnull;
   PRBool isBlockFrame = PR_FALSE;
@@ -4643,16 +4623,7 @@ nsCSSFrameConstructor::ConstructDocElementFrame(nsFrameConstructorState& aState,
   // set the primary frame
   aState.mFrameManager->SetPrimaryFrameFor(aDocElement, contentFrame);
 
-  // Finish building the scrollframe
-  if (isScrollable) {
-    FinishBuildingScrollFrame(aParentFrame, contentFrame);
-    // primary is set above (to the contentFrame)
-    
-    *aNewFrame = scrollFrame;
-  } else {
-    // if not scrollable the new frame is the content frame.
-    *aNewFrame = contentFrame;
-  }
+  *aNewFrame = contentFrame;
 
   mInitialContainingBlock = contentFrame;