VM: Precompiled rodata snapshot.

runtime/vm/virtual_memory.cc

Index: runtime/vm/virtual_memory.cc
diff --git a/runtime/vm/virtual_memory.cc b/runtime/vm/virtual_memory.cc
index 1ad6c06df3fb2323c3a647f7ae7c1c377611a5f5..1372545e923e139b7fcec5a2942851ffb98e79f7 100644
--- a/runtime/vm/virtual_memory.cc
+++ b/runtime/vm/virtual_memory.cc
@@ -28,8 +28,7 @@ void VirtualMemory::Truncate(intptr_t new_size, bool try_unmap) {
 }
 
 
-VirtualMemory* VirtualMemory::ForInstructionsSnapshot(void* pointer,
-                                                      uword size) {
+VirtualMemory* VirtualMemory::ForExternalPage(void* pointer, uword size) {
   // Memory for precompilated instructions was allocated by the embedder, so
   // create a VirtualMemory without allocating.
   MemoryRegion region(pointer, size);