VM: Fix libdart_lib_nosnapshot_precompiled_runtime build target.

runtime/vm/bootstrap.cc

 // 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.
 
 #include "vm/bootstrap.h"
 
 #include "include/dart_api.h"
 
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/compiler.h"
 #include "vm/dart_api_impl.h"
+#if !defined(DART_PRECOMPILED_RUNTIME)
 #include "vm/kernel.h"
 #include "vm/kernel_reader.h"
+#endif
 #include "vm/object.h"
 #include "vm/object_store.h"
 #include "vm/symbols.h"
 
 namespace dart {
 
 
 struct BootstrapLibProps {
   ObjectStore::BootstrapLibraryId index;
   const char* uri;
@@ skipping 282 matching lines @@
   if (error.IsNull()) {
     Finish(thread, /*from_kernel=*/false);
   }
   // Restore the library tag handler for the isolate.
   isolate->set_library_tag_handler(saved_tag_handler);
 
   return error.raw();
 }
 
 
+#if !defined(DART_PRECOMPILED_RUNTIME)
 static RawError* BootstrapFromKernel(Thread* thread,
                                      const uint8_t* buffer,
                                      intptr_t buffer_size) {
   Zone* zone = thread->zone();
   kernel::Program* program =
       ReadPrecompiledKernelFromBuffer(buffer, buffer_size);
   if (program == NULL) {
     const String& message =
         String::Handle(zone, String::New("Failed to read Kernel file"));
     return ApiError::New(message);
@@ skipping 26 matching lines @@
         reader.ReadLibrary(kernel_library);
         library.SetLoaded();
         break;
       }
     }
   }
 
   Finish(thread, /*from_kernel=*/true);
   return Error::null();
 }
+#else
+static RawError* BootstrapFromKernel(Thread* thread,
+                                     const uint8_t* buffer,
+                                     intptr_t buffer_size) {
+  UNREACHABLE();
+  return Error::null();
+}
+#endif
 
 
 RawError* Bootstrap::DoBootstrapping(const uint8_t* kernel_buffer,
                                      intptr_t kernel_buffer_length) {
   Thread* thread = Thread::Current();
   Isolate* isolate = thread->isolate();
   Zone* zone = thread->zone();
   String& uri = String::Handle(zone);
   Library& lib = Library::Handle(zone);
 
@@ skipping 12 matching lines @@
       isolate->object_store()->set_bootstrap_library(id, lib);
     }
   }
 
   return (kernel_buffer == NULL)
              ? BootstrapFromSource(thread)
              : BootstrapFromKernel(thread, kernel_buffer, kernel_buffer_length);
 }
 
 }  // namespace dart