Defer flushes if kPreferNoIO is specified

src/gpu/GrResourceCache.h

Index: src/gpu/GrResourceCache.h
diff --git a/src/gpu/GrResourceCache.h b/src/gpu/GrResourceCache.h
index 5483e1900c9add6512be7d406c0a8bf27e2a5f63..809c4f491e0ae3ba857cfc6668036dc61966d453 100644
--- a/src/gpu/GrResourceCache.h
+++ b/src/gpu/GrResourceCache.h
@@ -126,7 +126,9 @@ public:
     /**
      * Find a resource that matches a scratch key.
      */
-    GrGpuResource* findAndRefScratchResource(const GrScratchKey& scratchKey, uint32_t flags = 0);
+    GrGpuResource* findAndRefScratchResource(const GrScratchKey& scratchKey,
+                                             size_t resourceSize,
+                                             uint32_t flags);
     
 #ifdef SK_DEBUG
     // This is not particularly fast and only used for validation, so debug only.
@@ -206,6 +208,10 @@ private:
     void removeFromNonpurgeableArray(GrGpuResource*);
     bool overBudget() const { return fBudgetedBytes > fMaxBytes || fBudgetedCount > fMaxCount; }
 
+    bool wouldFit(size_t bytes) {
+        return fBudgetedBytes+bytes <= fMaxBytes && fBudgetedCount+1 <= fMaxCount;    
+    }
+
     uint32_t getNextTimestamp();
 
 #ifdef SK_DEBUG