Revert of GrResourceCache2 manages scratch texture.

src/gpu/GrResourceCache2.cpp

Index: src/gpu/GrResourceCache2.cpp
diff --git a/src/gpu/GrResourceCache2.cpp b/src/gpu/GrResourceCache2.cpp
index e2322a684e03fa3a336288f11fab4fc66f8403a5..e0ba26ae83516c54d4e87937bef28607f760b64d 100644
--- a/src/gpu/GrResourceCache2.cpp
+++ b/src/gpu/GrResourceCache2.cpp
@@ -8,8 +8,7 @@
 
 
 #include "GrResourceCache2.h"
-#include "GrGpuResource.h"  
-#include "SkRefCnt.h"
+#include "GrGpuResource.h"
 
 GrResourceCache2::~GrResourceCache2() {
     this->releaseAll();
@@ -56,18 +55,3 @@
     SkASSERT(!fScratchMap.count());
     SkASSERT(!fCount);
 }
-
-class GrResourceCache2::AvailableForScratchUse {
-public:
-    bool operator()(const GrGpuResource* resource) const {
-        // Because duties are currently shared between GrResourceCache and GrResourceCache2, the
-        // current interpretation of this rule is that only GrResourceCache has a ref but that
-        // it has been marked as a scratch resource.
-        return resource->reffedOnlyByCache() && GrIORef::kYes_IsScratch == resource->fIsScratch;
-    }
-};
-
-GrGpuResource* GrResourceCache2::findAndRefScratchResource(const GrResourceKey& scratchKey) {
-    SkASSERT(scratchKey.isScratch());
-    return SkSafeRef(fScratchMap.find(scratchKey, AvailableForScratchUse()));
-}