1 files changed, 6 insertions, 1 deletions
diff --git a/Source/WebCore/platform/graphics/android/layers/LayerContent.h b/Source/WebCore/platform/graphics/android/layers/LayerContent.h
index 97bc32a..2cd90a90 100644
--- a/Source/WebCore/platform/graphics/android/layers/LayerContent.h
+++ b/Source/WebCore/platform/graphics/android/layers/LayerContent.h
@@ -26,6 +26,7 @@
 #ifndef LayerContent_h
 #define LayerContent_h
 
+#include "IntRect.h"
 #include "SkRefCnt.h"
 #include <utils/threads.h>
 
@@ -35,14 +36,18 @@ class SkWStream;
 
 namespace WebCore {
 
+class PrerenderedInval;
+
 class LayerContent : public SkRefCnt {
 public:
     virtual int width() = 0;
     virtual int height() = 0;
-    virtual bool isEmpty() = 0;
+    virtual bool isEmpty() { return !width() || !height(); }
     virtual void checkForOptimisations() = 0;
     virtual bool hasText() = 0;
     virtual void draw(SkCanvas* canvas) = 0;
+    virtual PrerenderedInval* prerenderForRect(const IntRect& dirty) { return 0; }
+    virtual void clearPrerenders() { };
 
     virtual void serialize(SkWStream* stream) = 0;