Add size change notifications to GrResourceCache

src/gpu/GrResourceCache.h

Index: src/gpu/GrResourceCache.h
diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index b2f91cdbdb8c81d75875eed43464604c0255545c..0faa0d681ed9882dc89197a61417fc8bdd75d664 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -19,6 +19,7 @@
 #include "SkTInternalLList.h"
 
 class GrCacheable;
+class GrResourceCache;
 class GrResourceCacheEntry;
 
 class GrResourceKey {
@@ -128,12 +129,19 @@ public:
     void validate() const {}
 #endif
 
+    void onResourceSizeChanged();
+
 private:
-    GrResourceCacheEntry(const GrResourceKey& key, GrCacheable* resource);
+    GrResourceCacheEntry(GrResourceCache* resourceCache,
+                         const GrResourceKey& key,
+                         GrCacheable* resource);
     ~GrResourceCacheEntry();
 
+    GrResourceCache* fResourceCache;
     GrResourceKey    fKey;
     GrCacheable*     fResource;
+    size_t           fCachedSize;
+    bool             fIsExclusive;
 
     // Linked list for the LRU ordering.
     SK_DECLARE_INTERNAL_LLIST_INTERFACE(GrResourceCacheEntry);
@@ -272,6 +280,12 @@ public:
     void makeNonExclusive(GrResourceCacheEntry* entry);
 
     /**
+     * Notify the cache that the size of a resource has changed.
+     */
+    void onResourceSizeIncreased(const GrResourceCacheEntry*, size_t amount);
+    void onResourceSizeDecreased(const GrResourceCacheEntry*, size_t amount);
+
+    /**
      * Remove a resource from the cache and delete it!
      */
     void deleteResource(GrResourceCacheEntry* entry);