add ability to get FBO ID to Surface

src/image/SkSurface.cpp

Index: src/image/SkSurface.cpp
diff --git a/src/image/SkSurface.cpp b/src/image/SkSurface.cpp
index 35409be8105f15f7be0d1d2e97152d139ebad4af..2e8c7fa87ebe280a72547d24b12201630b41eec3 100644
--- a/src/image/SkSurface.cpp
+++ b/src/image/SkSurface.cpp
@@ -175,10 +175,14 @@ bool SkSurface::readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t d
     return this->getCanvas()->readPixels(dstInfo, dstPixels, dstRowBytes, srcX, srcY);
 }
 
-GrBackendObject SkSurface::getTextureHandle(TextureHandleAccess access) {
+GrBackendObject SkSurface::getTextureHandle(BackendHandleAccess access) {
     return asSB(this)->onGetTextureHandle(access);
 }
 
+bool SkSurface::getRenderTargetHandle(GrBackendObject* obj, BackendHandleAccess access) {
+    return asSB(this)->onGetRenderTargetHandle(obj, access);
+}
+
 //////////////////////////////////////////////////////////////////////////////////////
 
 #if !SK_SUPPORT_GPU