[Interpreter] Add support for strict mode global stores.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index abee9f78049502746686633adfe77f2d34e3516f..7a8954ffe63caba1e5ae9f6cd60b6642c5f6f031 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -265,12 +265,10 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::LoadGlobal(int slot_index) {
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::StoreGlobal(
     int slot_index, LanguageMode language_mode) {
-  if (!is_sloppy(language_mode)) {
-    UNIMPLEMENTED();
-  }
   DCHECK(slot_index >= 0);
+  Bytecode bytecode = BytecodeForStoreGlobal(language_mode);
   if (FitsInIdx8Operand(slot_index)) {
-    Output(Bytecode::kStaGlobal, static_cast<uint8_t>(slot_index));
+    Output(bytecode, static_cast<uint8_t>(slot_index));
   } else {
     UNIMPLEMENTED();
   }
@@ -809,6 +807,23 @@ Bytecode BytecodeArrayBuilder::BytecodeForKeyedStoreIC(
 
 
 // static
+Bytecode BytecodeArrayBuilder::BytecodeForStoreGlobal(
+    LanguageMode language_mode) {
+  switch (language_mode) {
+    case SLOPPY:
+      return Bytecode::kStaGlobalSloppy;
+    case STRICT:
+      return Bytecode::kStaGlobalStrict;
+    case STRONG:
+      UNIMPLEMENTED();
+    default:
+      UNREACHABLE();
+  }
+  return static_cast<Bytecode>(-1);
+}
+
+
+// static
 bool BytecodeArrayBuilder::FitsInIdx8Operand(int value) {
   return kMinUInt8 <= value && value <= kMaxUInt8;
 }