Change where layer hoisting data is gathered

src/core/SkDevice.cpp

Index: src/core/SkDevice.cpp
diff --git a/src/core/SkDevice.cpp b/src/core/SkDevice.cpp
index b912e6aef0ca06f0b2511666781f40b39d8dc4e7..3d5000f5694ae97752cdf01ed70da33aa340aca5 100644
--- a/src/core/SkDevice.cpp
+++ b/src/core/SkDevice.cpp
@@ -182,10 +182,6 @@ void* SkBaseDevice::onAccessPixels(SkImageInfo* info, size_t* rowBytes) {
     return NULL;
 }
 
-void SkBaseDevice::EXPERIMENTAL_optimize(const SkPicture* picture) {
-    // The base class doesn't perform any analysis but derived classes may
-}
-
 bool SkBaseDevice::EXPERIMENTAL_drawPicture(SkCanvas*, const SkPicture*, const SkMatrix*,
                                             const SkPaint*) {
     // The base class doesn't perform any accelerated picture rendering