VM: Support bootstrapping core libraries from Kernel binaries instead of source.

runtime/vm/bootstrap.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef RUNTIME_VM_BOOTSTRAP_H_
 #define RUNTIME_VM_BOOTSTRAP_H_
 
 #include "include/dart_api.h"
 #include "vm/allocation.h"
 
 namespace dart {
 
 // Forward declarations.
 class RawError;
 
 class Bootstrap : public AllStatic {
  public:
-  static RawError* DoBootstrapping();
+  // Compile the bootstrap libraries, either from sources or a Kernel binary.
+  // If kernel_buffer is NULL, compile from sources or source paths linked into
+  // the VM.  If it is non-NULL it represents a buffer holding a Kernel binary.
+  // The caller of this function is responsible for managing the kernel
+  // buffer's memory, and is welcome to deallocate it after this function
+  // returns.
+  static RawError* DoBootstrapping(const uint8_t* kernel_buffer,
+                                   intptr_t kernel_buffer_length);
+
   static void SetupNativeResolver();
   static bool IsBootstapResolver(Dart_NativeEntryResolver resolver);
 
   // Source path mapping for library URI and 'parts'.
   static const char* async_source_paths_[];
   static const char* core_source_paths_[];
   static const char* collection_source_paths_[];
   static const char* convert_source_paths_[];
   static const char* developer_source_paths_[];
   static const char* _internal_source_paths_[];
@@ skipping 19 matching lines @@
   static const char* _vmservice_patch_paths_[];
 
   // NULL patch paths for libraries that do not have patch files.
   static const char** profiler_patch_paths_;
   static const char** typed_data_patch_paths_;
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_BOOTSTRAP_H_