Add the Chrome-specific files from https://cs.chromium.org/chromium/s…

…rc/third_party/closure_compiler/runner/src/ to the Closure Compiler repo.

They were in the Chromium codebase to make it easier for the Chrome team to develop them, but nowadays they change very infrequently, so having them in the compiler itself will simplify their build scripts because they won't need a custom runner for the compiler; they can just pass the --chrome_pass flag.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=143576616

src/com/google/javascript/jscomp/ChromeCodingConvention.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2014 The Closure Compiler Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.javascript.jscomp;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.javascript.jscomp.ClosureCodingConvention.AssertInstanceofSpec;
+import com.google.javascript.rhino.Node;
+import com.google.javascript.rhino.jstype.FunctionType;
+import com.google.javascript.rhino.jstype.ObjectType;
+import java.util.Collection;
+import java.util.Set;
+
+public class ChromeCodingConvention extends CodingConventions.Proxy {
+  private final Set<String> indirectlyDeclaredProperties;
+
+  public ChromeCodingConvention() {
+    this(CodingConventions.getDefault());
+  }
+
+  public ChromeCodingConvention(CodingConvention wrapped) {
+    super(wrapped);
+    indirectlyDeclaredProperties = new ImmutableSet.Builder<String>()
+        .add("instance_", "getInstance")
+        .addAll(wrapped.getIndirectlyDeclaredProperties())
+        .build();
+  }
+
+  @Override
+  public String getSingletonGetterClassName(Node callNode) {
+    Node callArg = callNode.getFirstChild();
+    if (!callArg.matchesQualifiedName("cr.addSingletonGetter") || callNode.getChildCount() != 2) {
+      return super.getSingletonGetterClassName(callNode);
+    }
+    return callArg.getNext().getQualifiedName();
+  }
+
+  @Override
+  public void applySingletonGetterOld(FunctionType functionType,
+      FunctionType getterType, ObjectType objectType) {
+    super.applySingletonGetterOld(functionType, getterType, objectType);
+    functionType.defineDeclaredProperty("getInstance", getterType,
+        functionType.getSource());
+    functionType.defineDeclaredProperty("instance_", objectType,
+        functionType.getSource());
+  }
+
+  @Override
+  public Collection<String> getIndirectlyDeclaredProperties() {
+    return indirectlyDeclaredProperties;
+  }
+
+  @Override
+  public Collection<AssertionFunctionSpec> getAssertionFunctions() {
+    return ImmutableList.of(
+      new AssertionFunctionSpec("assert"),
+      new AssertInstanceofSpec("cr.ui.decorate")
+    );
+  }
+
+  @Override
+  public boolean isFunctionCallThatAlwaysThrows(Node n) {
+    return CodingConventions.defaultIsFunctionCallThatAlwaysThrows(
+        n, "assertNotReached");
+  }
+}