[Interpreter] Make InterpreterAssembler a subclass of CodeStubAssembler.

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index 5951a0c6a795de55e065adb98751fb461b1848ce..c881909e08b2e5364b19b861614dfcad4e4180e5 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -606,8 +606,6 @@
         '../../src/compiler/instruction.h',
         '../../src/compiler/int64-lowering.cc',
         '../../src/compiler/int64-lowering.h',
-        '../../src/compiler/interpreter-assembler.cc',
-        '../../src/compiler/interpreter-assembler.h',
         '../../src/compiler/js-builtin-reducer.cc',
         '../../src/compiler/js-builtin-reducer.h',
         '../../src/compiler/js-call-reducer.cc',
@@ -945,6 +943,8 @@
         '../../src/interpreter/handler-table-builder.h',
         '../../src/interpreter/interpreter.cc',
         '../../src/interpreter/interpreter.h',
+        '../../src/interpreter/interpreter-assembler.cc',
+        '../../src/interpreter/interpreter-assembler.h',
         '../../src/interpreter/register-translator.cc',
         '../../src/interpreter/register-translator.h',
         '../../src/interpreter/source-position-table.cc',