Alter SkCanvas::drawPicture (devirtualize, take const SkPicture, take pointer)

src/core/SkDevice.cpp

Index: src/core/SkDevice.cpp
diff --git a/src/core/SkDevice.cpp b/src/core/SkDevice.cpp
index 36a8a754c017c44c368367b90af7fa467715d617..6c5c0f391da1ee87a2bb85a7610666ff1ca43bd0 100644
--- a/src/core/SkDevice.cpp
+++ b/src/core/SkDevice.cpp
@@ -131,15 +131,15 @@ void* SkBaseDevice::onAccessPixels(SkImageInfo* info, size_t* rowBytes) {
     return NULL;
 }
 
-void SkBaseDevice::EXPERIMENTAL_optimize(SkPicture* picture) {
+void SkBaseDevice::EXPERIMENTAL_optimize(const SkPicture* picture) {
     // The base class doesn't perform any analysis but derived classes may
 }
 
-void SkBaseDevice::EXPERIMENTAL_purge(SkPicture* picture) {
+void SkBaseDevice::EXPERIMENTAL_purge(const SkPicture* picture) {
     // Derived-classes may have data to purge but not the base class
 }
 
-bool SkBaseDevice::EXPERIMENTAL_drawPicture(SkCanvas* canvas, SkPicture* picture) {
+bool SkBaseDevice::EXPERIMENTAL_drawPicture(SkCanvas* canvas, const SkPicture* picture) {
     // The base class doesn't perform any accelerated picture rendering
     return false;
 }