Refactor to separate backend object lifecycle and GpuResource budget decision

src/gpu/GrTexture.cpp

Index: src/gpu/GrTexture.cpp
diff --git a/src/gpu/GrTexture.cpp b/src/gpu/GrTexture.cpp
index 349e6a383ff2160943d13ab2914b46c82be26e8d..033f1da8914daf2ea674059d274e1139a4168468 100644
--- a/src/gpu/GrTexture.cpp
+++ b/src/gpu/GrTexture.cpp
@@ -86,16 +86,10 @@ GrSurfaceOrigin resolve_origin(const GrSurfaceDesc& desc) {
 }
 
 //////////////////////////////////////////////////////////////////////////////
-GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc,
-                     GrSLType samplerType, bool wasMipMapDataProvided)
-    : INHERITED(gpu, lifeCycle, desc)
+GrTexture::GrTexture(GrGpu* gpu, const GrSurfaceDesc& desc, GrSLType samplerType,
+                     bool wasMipMapDataProvided)
+    : INHERITED(gpu, desc)
     , fSamplerType(samplerType) {
-    if (!this->isExternal() && !GrPixelConfigIsCompressed(desc.fConfig)) {
-        GrScratchKey key;
-        GrTexturePriv::ComputeScratchKey(desc, &key);
-        this->setScratchKey(key);
-    }
-
     if (wasMipMapDataProvided) {
         fMipMapsStatus = kValid_MipMapsStatus;
         fMaxMipMapLevel = SkMipMap::ComputeLevelCount(fDesc.fWidth, fDesc.fHeight);
@@ -105,6 +99,12 @@ GrTexture::GrTexture(GrGpu* gpu, LifeCycle lifeCycle, const GrSurfaceDesc& desc,
     }
 }
 
+void GrTexture::computeScratchKey(GrScratchKey* key) const {
+    if (!GrPixelConfigIsCompressed(fDesc.fConfig)) {
+        GrTexturePriv::ComputeScratchKey(fDesc, key);
+    }
+}
+
 void GrTexturePriv::ComputeScratchKey(const GrSurfaceDesc& desc, GrScratchKey* key) {
     static const GrScratchKey::ResourceType kType = GrScratchKey::GenerateResourceType();