[wasm] Remove unnecessary kExprNop from WASM_BR and other macros.

test/unittests/wasm/wasm-macro-gen-unittest.cc

Index: test/unittests/wasm/wasm-macro-gen-unittest.cc
diff --git a/test/unittests/wasm/wasm-macro-gen-unittest.cc b/test/unittests/wasm/wasm-macro-gen-unittest.cc
index 43bc4fc4ecd3fa8f58a2f1537f36a31c1ffac803..be8a18473971c192a4572dc29d3c6524cdbee1cc 100644
--- a/test/unittests/wasm/wasm-macro-gen-unittest.cc
+++ b/test/unittests/wasm/wasm-macro-gen-unittest.cc
@@ -64,19 +64,19 @@ TEST_F(WasmMacroGenTest, Statements) {
 
   EXPECT_SIZE(5, WASM_SELECT(WASM_ZERO, WASM_NOP, WASM_NOP));
 
-  EXPECT_SIZE(4, WASM_BR(0));
+  EXPECT_SIZE(3, WASM_BR(0));
   EXPECT_SIZE(5, WASM_BR_IF(0, WASM_ZERO));
 
   EXPECT_SIZE(3, WASM_BLOCK(1, WASM_NOP));
   EXPECT_SIZE(4, WASM_BLOCK(2, WASM_NOP, WASM_NOP));
   EXPECT_SIZE(5, WASM_BLOCK(3, WASM_NOP, WASM_NOP, WASM_NOP));
 
-  EXPECT_SIZE(6, WASM_INFINITE_LOOP);
+  EXPECT_SIZE(5, WASM_INFINITE_LOOP);
 
   EXPECT_SIZE(3, WASM_LOOP(1, WASM_NOP));
   EXPECT_SIZE(4, WASM_LOOP(2, WASM_NOP, WASM_NOP));
   EXPECT_SIZE(5, WASM_LOOP(3, WASM_NOP, WASM_NOP, WASM_NOP));
-  EXPECT_SIZE(6, WASM_LOOP(1, WASM_BR(0)));
+  EXPECT_SIZE(5, WASM_LOOP(1, WASM_BR(0)));
   EXPECT_SIZE(7, WASM_LOOP(1, WASM_BR_IF(0, WASM_ZERO)));
 
   EXPECT_SIZE(2, WASM_RETURN0);
@@ -91,8 +91,8 @@ TEST_F(WasmMacroGenTest, MacroStatements) {
   EXPECT_SIZE(7, WASM_INC_LOCAL(0));
   EXPECT_SIZE(7, WASM_INC_LOCAL_BY(0, 3));
 
-  EXPECT_SIZE(4, WASM_BREAK(0));
-  EXPECT_SIZE(4, WASM_CONTINUE(0));
+  EXPECT_SIZE(3, WASM_BREAK(0));
+  EXPECT_SIZE(3, WASM_CONTINUE(0));
 }
 
 TEST_F(WasmMacroGenTest, BrTable) {