Revert "Move constant declarations to only class where they are used"

This reverts commit 48bea1f.

Author: sebastianbergmann

src/CodeCoverage/Driver.php

@@ -15,6 +15,24 @@
  */
 interface PHP_CodeCoverage_Driver
 {
+    /**
+     * @var int
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    const LINE_EXECUTED = 1;
+
+    /**
+     * @var int
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    const LINE_NOT_EXECUTED = -1;
+
+    /**
+     * @var int
+     * @see http://xdebug.org/docs/code_coverage
+     */
+    const LINE_NOT_EXECUTABLE = -2;
+
     /**
      * Start collection of code coverage information.
      */

src/CodeCoverage/Driver/PHPDBG.php

@@ -16,24 +16,6 @@
  */
 class PHP_CodeCoverage_Driver_PHPDBG implements PHP_CodeCoverage_Driver
 {
-    /**
-     * @var int
-     * @see http://xdebug.org/docs/code_coverage
-     */
-    const LINE_EXECUTED = 1;
-
-    /**
-     * @var int
-     * @see http://xdebug.org/docs/code_coverage
-     */
-    const LINE_NOT_EXECUTED = -1;
-
-    /**
-     * @var int
-     * @see http://xdebug.org/docs/code_coverage
-     */
-    const LINE_NOT_EXECUTABLE = -2;
-
     /**
      * Constructor.
      */