GrResourceCache2 manages scratch texture.

src/gpu/GrGpuResource.cpp

Index: src/gpu/GrGpuResource.cpp
diff --git a/src/gpu/GrGpuResource.cpp b/src/gpu/GrGpuResource.cpp
index bba934e6059e5851721545dc916e49d10024c735..a074d7c29e0bbffd09dac65b75b6957cbf9e66e9 100644
--- a/src/gpu/GrGpuResource.cpp
+++ b/src/gpu/GrGpuResource.cpp
@@ -11,7 +11,7 @@
 #include "GrResourceCache2.h"
 #include "GrGpu.h"
 
-GrIORef::~GrIORef() {
+template<typename D> GrIORef<D>::~GrIORef() {
     SkASSERT(0 == fRefCnt);
     SkASSERT(0 == fPendingReads);
     SkASSERT(0 == fPendingWrites);
@@ -28,6 +28,13 @@ static inline GrResourceCache2* get_resource_cache2(GrGpu* gpu) {
     return gpu->getContext()->getResourceCache2();
 }
 
+static inline GrResourceCache* get_resource_cache(GrGpu* gpu) {
+    SkASSERT(gpu);
+    SkASSERT(gpu->getContext());
+    SkASSERT(gpu->getContext()->getResourceCache());
+    return gpu->getContext()->getResourceCache();
+}
+
 GrGpuResource::GrGpuResource(GrGpu* gpu, bool isWrapped)
     : fGpu(gpu)
     , fCacheEntry(NULL)
@@ -81,6 +88,12 @@ GrContext* GrGpuResource::getContext() {
     }
 }
 
+void GrGpuResource::notifyIsPurgable() const {
+    if (fCacheEntry && !this->wasDestroyed()) {
+        get_resource_cache(fGpu)->notifyPurgable(this);
+    }
+}
+
 void GrGpuResource::setScratchKey(const GrResourceKey& scratchKey) {
     SkASSERT(fScratchKey.isNullScratch());
     SkASSERT(scratchKey.isScratch());