Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/core/style/FillLayer.h

Index: third_party/WebKit/Source/core/style/FillLayer.h
diff --git a/third_party/WebKit/Source/core/style/FillLayer.h b/third_party/WebKit/Source/core/style/FillLayer.h
index fd86d5dc95c69c7048b7c9e6588997a9a8316d1f..ea8a6fd1d1746f8415c586c27ed97eedee3c4ee0 100644
--- a/third_party/WebKit/Source/core/style/FillLayer.h
+++ b/third_party/WebKit/Source/core/style/FillLayer.h
@@ -110,7 +110,7 @@ public:
     bool isSizeSet() const { return m_sizeType != SizeNone; }
     bool isMaskSourceTypeSet() const { return m_maskSourceTypeSet; }
 
-    void setImage(PassRefPtrWillBeRawPtr<StyleImage> i) { m_image = i; m_imageSet = true; }
+    void setImage(RawPtr<StyleImage> i) { m_image = i; m_imageSet = true; }
     void setXPosition(const Length& position) { m_xPosition = position; m_xPosSet = true; m_backgroundXOriginSet = false; m_backgroundXOrigin = LeftEdge; }
     void setYPosition(const Length& position) { m_yPosition = position; m_yPosSet = true; m_backgroundYOriginSet = false; m_backgroundYOrigin = TopEdge; }
     void setBackgroundXOrigin(BackgroundEdgeOrigin origin) { m_backgroundXOrigin = origin; m_backgroundXOriginSet = true; }
@@ -213,7 +213,7 @@ private:
 
     FillLayer* m_next;
 
-    RefPtrWillBePersistent<StyleImage> m_image;
+    Persistent<StyleImage> m_image;
 
     Length m_xPosition;
     Length m_yPosition;