[interpreter] Disable OSR for BytecodeGenerator tests.

test/cctest/interpreter/test-bytecode-generator.cc

 // Copyright 2015 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.
 
 #include <fstream>
 
 #include "src/v8.h"
 
 #include "src/compiler.h"
 #include "src/interpreter/bytecode-array-iterator.h"
@@ skipping 54 matching lines @@
   REPEAT_8_UNIQUE_VARS()         \
   UNIQUE_VAR()
 
 static const char* kGoldenFileDirectory =
     "test/cctest/interpreter/bytecode_expectations/";
 
 class InitializedIgnitionHandleScope : public InitializedHandleScope {
  public:
   InitializedIgnitionHandleScope() {
     i::FLAG_ignition = true;
+    i::FLAG_ignition_osr = false;  // TODO(4764): Disabled for now.
     i::FLAG_always_opt = false;
     i::FLAG_allow_natives_syntax = true;
     CcTest::i_isolate()->interpreter()->Initialize();
   }
 };
 
 void SkipGoldenFileHeader(std::istream& stream) {  // NOLINT
   std::string line;
   int separators_seen = 0;
   while (std::getline(stream, line)) {
@@ skipping 2156 matching lines @@
       "f();\n",
   };
 
   CHECK(CompareTexts(BuildActual(printer, snippets),
                      LoadGolden("Generators.golden")));
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8