Make some accidentally public classes package-private

MOE_MIGRATED_REVID=172370009

Author: cushon

core/src/main/java/com/google/googlejavaformat/java/DimensionHelpers.java

@@ -34,7 +34,7 @@
  *
  * <p>For example, {@code int [] a;} cannot be distinguished from {@code int [] a [];} in the AST.
  */
-public class DimensionHelpers {
+class DimensionHelpers {
 
   /** The array dimension specifiers (including any type annotations) associated with a type. */
   static class TypeWithDims {

core/src/main/java/com/google/googlejavaformat/java/FormatFileCallable.java

@@ -23,7 +23,7 @@
  * Encapsulates information about a file to be formatted, including which parts of the file to
  * format.
  */
-public class FormatFileCallable implements Callable<String> {
+class FormatFileCallable implements Callable<String> {
   private final String input;
   private final CommandLineOptions parameters;
   private final JavaFormatterOptions options;

core/src/main/java/com/google/googlejavaformat/java/JavacTokens.java

@@ -30,7 +30,7 @@
 import org.openjdk.tools.javac.util.Context;
 
 /** A wrapper around javac's lexer. */
-public class JavacTokens {
+class JavacTokens {
 
   /** The lexer eats terminal comments, so feed it one we don't care about. */
   // TODO(b/33103797): fix javac and remove the work-around

core/src/main/java/com/google/googlejavaformat/java/Trees.java

@@ -31,7 +31,7 @@
 import org.openjdk.tools.javac.tree.TreeInfo;
 
 /** Utilities for working with {@link Tree}s. */
-public class Trees {
+class Trees {
   /** Returns the length of the source for the node. */
   static int getLength(Tree tree, TreePath path) {
     return getEndPosition(tree, path) - getStartPosition(tree);