[wasm] Rename wasm::LocalType to wasm::ValueType and kAst* to kWasm*

test/inspector/debugger/wasm-scripts.js

 // Copyright 2016 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.
 
 // Flags: --expose-wasm
 
 load('test/mjsunit/wasm/wasm-constants.js');
 load('test/mjsunit/wasm/wasm-module-builder.js');
 
 // Add two empty functions. Both should be registered as individual scripts at
 // module creation time.
 var builder = new WasmModuleBuilder();
 builder.addFunction('nopFunction', kSig_v_v).addBody([kExprNop]);
 builder.addFunction('main', kSig_v_v)
-    .addBody([kExprBlock, kAstStmt, kExprI32Const, 2, kExprDrop, kExprEnd])
+    .addBody([kExprBlock, kWasmStmt, kExprI32Const, 2, kExprDrop, kExprEnd])
     .exportAs('main');
 var module_bytes = builder.toArray();
 
 function testFunction(bytes) {
   var buffer = new ArrayBuffer(bytes.length);
   var view = new Uint8Array(buffer);
   for (var i = 0; i < bytes.length; i++) {
     view[i] = bytes[i] | 0;
   }
 
@@ skipping 36 matching lines @@
       InspectorTest.log("Source for " + url + ":");
       InspectorTest.log(message.result.scriptSource);
       --missing_sources;
     }
 
     Protocol.Debugger.getScriptSource({scriptId: messageObject.params.scriptId})
         .then(dumpScriptSource.bind(null))
         .then(checkFinished);
   }
 }