Cache render targets that render to wrapped textures

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index 28746b93056fa4361230f5e973814f24d60b4c36..9a8754bb119b2700eda512a3c4c525911aa75f92 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -51,7 +51,6 @@ size_t GrTexture::onGpuMemorySize() const {
         textureSize += textureSize/3;
     }
 
-    SkASSERT(!SkToBool(fDesc.fFlags & kRenderTarget_GrSurfaceFlag));
     SkASSERT(textureSize <= WorseCaseSize(fDesc));
 
     return textureSize;
@@ -87,17 +86,10 @@ GrSurfaceOrigin resolve_origin(const GrSurfaceDesc& desc) {
 }
 
 //////////////////////////////////////////////////////////////////////////////
-GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc,
+GrTexture::GrTexture(GrGpu* gpu, SkBudgeted budgeted, const GrSurfaceDesc& desc,
                      GrSLType samplerType, bool wasMipMapDataProvided)
-    : INHERITED(gpu, lifeCycle, desc)
+    : INHERITED(gpu, budgeted, desc)
     , fSamplerType(samplerType) {
-    if (!this->isExternal() && !GrPixelConfigIsCompressed(desc.fConfig) &&
-        !desc.fTextureStorageAllocator.fAllocateTextureStorage) {
-        GrScratchKey key;
-        GrTexturePriv::ComputeScratchKey(desc, &key);
-        this->setScratchKey(key);
-    }
-
     if (wasMipMapDataProvided) {
         fMipMapsStatus = kValid_MipMapsStatus;
         fMaxMipMapLevel = SkMipMap::ComputeLevelCount(fDesc.fWidth, fDesc.fHeight);
@@ -107,6 +99,15 @@ GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc,
     }
 }
 
+void GrTexture::initScratchKeyIfNeeded() {
+    if (!this->refsWrappedResources() && !GrPixelConfigIsCompressed(fDesc.fConfig) &&
+        !fDesc.fTextureStorageAllocator.fAllocateTextureStorage) {
+        GrScratchKey key;
+        GrTexturePriv::ComputeScratchKey(fDesc, &key);
+        this->setScratchKey(key);
+    }
+}
+
 void GrTexturePriv::ComputeScratchKey(const GrSurfaceDesc& desc, GrScratchKey* key) {
     static const GrScratchKey::ResourceType kType = GrScratchKey::GenerateResourceType();