Revert of DevTools: clean up scripts folder

third_party/WebKit/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/FileCheckerCallable.java

Index: third_party/WebKit/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/FileCheckerCallable.java
diff --git a/third_party/WebKit/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/FileCheckerCallable.java b/third_party/WebKit/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/FileCheckerCallable.java
new file mode 100644
index 0000000000000000000000000000000000000000..c2dae58a3e589c37b0a77475fe976ce817bb8430
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/scripts/jsdoc-validator/src/org/chromium/devtools/jsdoc/FileCheckerCallable.java
@@ -0,0 +1,114 @@
+package org.chromium.devtools.jsdoc;
+
+import com.google.javascript.jscomp.Compiler;
+import com.google.javascript.jscomp.NodeTraversal;
+import com.google.javascript.jscomp.parsing.Config;
+import com.google.javascript.jscomp.parsing.Config.LanguageMode;
+import com.google.javascript.jscomp.parsing.ParserRunner;
+import com.google.javascript.rhino.ErrorReporter;
+import com.google.javascript.rhino.Node;
+
+import org.chromium.devtools.jsdoc.checks.ContextTrackingValidationCheck;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.concurrent.Callable;
+
+public class FileCheckerCallable implements Callable<ValidatorContext> {
+
+    private static Set<String> EXTRA_ANNOTATIONS = new HashSet<>(Arrays.asList(
+        "suppressReceiverCheck",
+        "suppressGlobalPropertiesCheck"
+    ));
+    private final String fileName;
+
+    public FileCheckerCallable(String fileName) {
+        this.fileName = fileName;
+    }
+
+    @Override
+    public ValidatorContext call() {
+        try {
+            ValidatorContext context = new ValidatorContext(readScriptText(), fileName);
+            ValidationCheckDispatcher dispatcher = new ValidationCheckDispatcher(context);
+            dispatcher.registerCheck(new ContextTrackingValidationCheck());
+            NodeTraversal.traverse(new Compiler(), parseScript(context), dispatcher);
+            return context;
+        } catch (FileNotFoundException e) {
+            logError("File not found: " + fileName);
+        } catch (IOException e) {
+            logError("Failed to read file " + fileName);
+        }
+        return null;
+    }
+
+    private String readScriptText() throws IOException {
+        byte[] encoded = Files.readAllBytes(FileSystems.getDefault().getPath(fileName));
+        String text = StandardCharsets.UTF_8.decode(ByteBuffer.wrap(encoded)).toString();
+        return text;
+    }
+
+    private static Node parseScript(final ValidatorContext context) {
+        Config config = ParserRunner.createConfig(
+            true, true, true, LanguageMode.ECMASCRIPT5_STRICT, EXTRA_ANNOTATIONS);
+        ErrorReporter errorReporter = new ErrorReporter() {
+            @Override
+            public void warning(String message, String sourceName, int line, int lineOffset) {
+                // Ignore.
+            }
+
+            @Override
+            public void error(String message, String sourceName, int line, int lineOffset) {
+                logError("at " + sourceName + ":" + line + ":" + lineOffset);
+            }
+        };
+        try {
+            return ParserRunner.parse(
+                    context.sourceFile, context.sourceFile.getCode(), config, errorReporter).ast;
+        } catch (IOException e) {
+            // Does not happen with preloaded files.
+            return null;
+        }
+    }
+
+    private static void logError(String message) {
+        System.err.println("ERROR: " + message);
+    }
+
+    private static class ValidationCheckDispatcher extends DoDidVisitorAdapter {
+        private final List<ValidationCheck> checks = new ArrayList<>(2);
+        private final ValidatorContext context;
+
+        public ValidationCheckDispatcher(ValidatorContext context) {
+            this.context = context;
+        }
+
+        public void registerCheck(ValidationCheck check) {
+            check.setContext(context);
+            checks.add(check);
+        }
+
+        @Override
+        public void doVisit(Node node) {
+            for (DoDidNodeVisitor visitor : checks) {
+                visitor.doVisit(node);
+            }
+        }
+
+        @Override
+        public void didVisit(Node node) {
+            for (ValidationCheck check : checks) {
+                check.didVisit(node);
+            }
+        }
+    }
+}