free cache in destructor, in case endContext was not called. change Resize to return bool indicating success.

BUG=
R=humper@google.com

Review URL: https://codereview.chromium.org/20102002

git-svn-id: http://skia.googlecode.com/svn/trunk@10335 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/core/SkBitmapProcState.h b/src/core/SkBitmapProcState.h
index 70d7c0c..e138ed2 100644
--- a/src/core/SkBitmapProcState.h
+++ b/src/core/SkBitmapProcState.h
@@ -37,10 +37,7 @@
 struct SkBitmapProcState {
 
     SkBitmapProcState(): fScaledCacheID(NULL), fBitmapFilter(NULL) {}
-    ~SkBitmapProcState() {
-        SkASSERT(NULL == fScaledCacheID);
-        SkDELETE(fBitmapFilter);
-    }
+    ~SkBitmapProcState();
 
     typedef void (*ShaderProc32)(const SkBitmapProcState&, int x, int y,
                                  SkPMColor[], int count);