Proposed SkCanvas API for preLoading textures to VRAM

src/core/SkDevice.cpp

Index: src/core/SkDevice.cpp
===================================================================
--- src/core/SkDevice.cpp	(revision 13719)
+++ src/core/SkDevice.cpp	(working copy)
@@ -155,6 +155,10 @@
     return result;
 }
 
+void SkBaseDevice::internalPrivate_PreLoad(const SkBitmap& bitmap, const SkIRect& rect) {
+    // derived classes can make use of this information
+}
+
 SkSurface* SkBaseDevice::newSurface(const SkImageInfo&) { return NULL; }
 
 const void* SkBaseDevice::peekPixels(SkImageInfo*, size_t*) { return NULL; }