Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/paint/PaintLayer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * Portions are Copyright (C) 1998 Netscape Communications Corporation.
  *
  * Other contributors:
  *   Robert O'Callahan <roc+@cs.cmu.edu>
  *   David Baron <dbaron@fas.harvard.edu>
  *   Christian Biesinger <cbiesinger@web.de>
  *   Randall Jesup <rjesup@wgate.com>
@@ skipping 84 matching lines @@
 namespace {
 
 static CompositingQueryMode gCompositingQueryMode =
     CompositingQueriesAreOnlyAllowedInCertainDocumentLifecyclePhases;
 
 struct SameSizeAsPaintLayer : DisplayItemClient {
     int bitFields;
     void* pointers[9];
     LayoutUnit layoutUnits[4];
     IntSize size;
-    OwnPtrWillBePersistent<PaintLayerScrollableArea> scrollableArea;
+    Persistent<PaintLayerScrollableArea> scrollableArea;
     struct {
         IntRect rect;
         void* pointers[2];
     } ancestorCompositingInputs;
     struct {
         IntSize size;
         void* pointer;
         LayoutRect rect;
     } previousPaintStatus;
 };
@@ skipping 2458 matching lines @@
 
 FilterOperations computeFilterOperationsHandleReferenceFilters(const FilterOperations& filters, float effectiveZoom, Node* enclosingNode)
 {
     if (filters.hasReferenceFilter()) {
         for (size_t i = 0; i < filters.size(); ++i) {
             FilterOperation* filterOperation = filters.operations().at(i).get();
             if (filterOperation->type() != FilterOperation::REFERENCE)
                 continue;
             ReferenceFilterOperation& referenceOperation = toReferenceFilterOperation(*filterOperation);
             // FIXME: Cache the Filter if it didn't change.
-            RefPtrWillBeRawPtr<Filter> referenceFilter = ReferenceFilterBuilder::build(effectiveZoom, toElement(enclosingNode), nullptr, referenceOperation);
+            RawPtr<Filter> referenceFilter = ReferenceFilterBuilder::build(effectiveZoom, toElement(enclosingNode), nullptr, referenceOperation);
             referenceOperation.setFilter(referenceFilter.release());
         }
     }
 
     return filters;
 }
 
 } // unnamed namespace
 
 FilterOperations PaintLayer::computeFilterOperations(const ComputedStyle& style) const
@@ skipping 206 matching lines @@
 
 void showLayerTree(const blink::LayoutObject* layoutObject)
 {
     if (!layoutObject) {
         fprintf(stderr, "Cannot showLayerTree. Root is (nil)\n");
         return;
     }
     showLayerTree(layoutObject->enclosingLayer());
 }
 #endif