Automatically cleanup textures that don't fit in the cache.

Change-Id: I4f29ed96ea11118b391fb957e1e4d1b8fcef1537
diff --git a/libs/hwui/TextureCache.cpp b/libs/hwui/TextureCache.cpp
index 4975edb..59903b7 100644
--- a/libs/hwui/TextureCache.cpp
+++ b/libs/hwui/TextureCache.cpp
@@ -93,11 +93,13 @@
         if (size < mMaxSize) {
             mSize += size;
             mCache.put(bitmap, texture);
+        } else {
+            texture->cleanup = true;
         }
     } else if (bitmap->getGenerationID() != texture->generation) {
         generateTexture(bitmap, texture, true);
     }
-    // TODO: Do something to destroy the texture object if it's too big for the cache
+
     return texture;
 }