Update to V8 with partial snapshots. This is taken from the partial_snapshot branch of V8.
diff --git a/src/mips/builtins-mips.cc b/src/mips/builtins-mips.cc
new file mode 100644
index 0000000..3bd42ed
--- /dev/null
+++ b/src/mips/builtins-mips.cc
@@ -0,0 +1,109 @@
+// Copyright 2010 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+
+#include "v8.h"
+
+#include "codegen-inl.h"
+#include "debug.h"
+#include "runtime.h"
+
+namespace v8 {
+namespace internal {
+
+
+#define __ ACCESS_MASM(masm)
+
+
+void Builtins::Generate_Adaptor(MacroAssembler* masm,
+                                CFunctionId id,
+                                BuiltinExtraArguments extra_args) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_ArrayConstructCode(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_JSConstructCall(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_JSConstructStubGeneric(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
+                                             bool is_construct) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
+  Generate_JSEntryTrampolineHelper(masm, false);
+}
+
+
+void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
+  Generate_JSEntryTrampolineHelper(masm, true);
+}
+
+
+void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
+  UNIMPLEMENTED_MIPS();
+}
+
+
+#undef __
+
+} }  // namespace v8::internal
+