Fixing leaky handling of SkImage in SkDeferredCanvas.

src/pipe/SkGPipePriv.h

Index: src/pipe/SkGPipePriv.h
diff --git a/src/pipe/SkGPipePriv.h b/src/pipe/SkGPipePriv.h
index c3919f635bd6232221d51eb37a08266a0bf1f5b5..5f6e45b158284be3ec1cd44b28771f983e835990 100644
--- a/src/pipe/SkGPipePriv.h
+++ b/src/pipe/SkGPipePriv.h
@@ -222,6 +222,8 @@ public:
     SkImageHeap();
     virtual ~SkImageHeap();
 
+    size_t bytesInCache() const { return fBytesInCache; }
+    void reset();
     // slot must be "valid" -- 0 is never valid
     const SkImage* get(int32_t slot) const;
     // returns 0 if not found, else returns slot
@@ -231,6 +233,7 @@ public:
 
 private:
     SkTDArray<const SkImage*> fArray;
+    size_t fBytesInCache;
 };
 
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