Upgrade V8 to 8.8.278.14

Bug: 162604069
Bug: 167389063
Test: gts-tradefed run gts-dev --module GtsGmscoreHostTestCases
      --test com.google.android.gts.devicepolicy.DeviceOwnerTest#testProxyPacProxyTest
Test: m -j proxy_resolver_v8_unittest && adb sync && adb shell \
      /data/nativetest/proxy_resolver_v8_unittest/proxy_resolver_v8_unittest

Change-Id: Ifb09923b9d7f6d8990fb062d7dc0294edf2c098e
diff --git a/src/codegen/code-reference.h b/src/codegen/code-reference.h
new file mode 100644
index 0000000..8ff3581
--- /dev/null
+++ b/src/codegen/code-reference.h
@@ -0,0 +1,70 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_CODEGEN_CODE_REFERENCE_H_
+#define V8_CODEGEN_CODE_REFERENCE_H_
+
+#include "src/handles/handles.h"
+#include "src/objects/code.h"
+
+namespace v8 {
+namespace internal {
+
+class Code;
+class CodeDesc;
+
+namespace wasm {
+class WasmCode;
+}  // namespace wasm
+
+class CodeReference {
+ public:
+  CodeReference() : kind_(NONE), null_(nullptr) {}
+  explicit CodeReference(const wasm::WasmCode* wasm_code)
+      : kind_(WASM), wasm_code_(wasm_code) {}
+  explicit CodeReference(const CodeDesc* code_desc)
+      : kind_(CODE_DESC), code_desc_(code_desc) {}
+  explicit CodeReference(Handle<Code> js_code) : kind_(JS), js_code_(js_code) {}
+
+  Address constant_pool() const;
+  Address instruction_start() const;
+  Address instruction_end() const;
+  int instruction_size() const;
+  const byte* relocation_start() const;
+  const byte* relocation_end() const;
+  int relocation_size() const;
+  Address code_comments() const;
+  int code_comments_size() const;
+
+  bool is_null() const { return kind_ == NONE; }
+  bool is_js() const { return kind_ == JS; }
+  bool is_wasm_code() const { return kind_ == WASM; }
+
+  Handle<Code> as_js_code() const {
+    DCHECK_EQ(JS, kind_);
+    return js_code_;
+  }
+
+  const wasm::WasmCode* as_wasm_code() const {
+    DCHECK_EQ(WASM, kind_);
+    return wasm_code_;
+  }
+
+ private:
+  enum { NONE, JS, WASM, CODE_DESC } kind_;
+  union {
+    std::nullptr_t null_;
+    const wasm::WasmCode* wasm_code_;
+    const CodeDesc* code_desc_;
+    Handle<Code> js_code_;
+  };
+
+  DISALLOW_NEW_AND_DELETE()
+};
+ASSERT_TRIVIALLY_COPYABLE(CodeReference);
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_CODEGEN_CODE_REFERENCE_H_