Add deferred texture upload API.

src/image/SkImage.cpp

Index: src/image/SkImage.cpp
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index 07279501a38df3db1b7e4f5d48d771690f3729d3..b2ed91138e1023ea57e11ad5467d4ec36c71382a 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -344,6 +344,16 @@ bool SkImage::isLazyGenerated() const {
 #if !SK_SUPPORT_GPU
 
 SkImage* SkImage::NewTextureFromPixmap(GrContext*, const SkPixmap&, SkBudgeted budgeted) {
+    return nullptr
+}
+
+size_t SkImage::getDeferredTextureImageData(const GrContextThreadSafeProxy&,
+                                            const DeferredTextureImageUsageParams[],
+                                            int paramCnt, void* buffer) const {
+    return 0;
+}
+
+SkImage* SkImage::NewFromDeferredTextureImageData(GrContext* context, const void*, SkBudgeted) {
     return nullptr;
 }