[stubs] Suppress shifts with immediate shift of zero.

src/compiler/code-assembler.h

Index: src/compiler/code-assembler.h
diff --git a/src/compiler/code-assembler.h b/src/compiler/code-assembler.h
index b05dc1ac7b8e43474bdf0fce283da3a39b3fec3b..fd54bcbb4f52981b3ab15b9c829481c35e50311b 100644
--- a/src/compiler/code-assembler.h
+++ b/src/compiler/code-assembler.h
@@ -285,6 +285,7 @@ class CodeAssembler {
 
   Node* WordShl(Node* value, int shift);
   Node* WordShr(Node* value, int shift);
+  Node* Word32Shr(Node* value, int shift);
 
 // Unary
 #define DECLARE_CODE_ASSEMBLER_UNARY_OP(name) Node* name(Node* a);