bluetooth: Add control for reading/writing of characteristics to internals page.

chrome/test/data/webui/test_api.js

Index: chrome/test/data/webui/test_api.js
diff --git a/chrome/test/data/webui/test_api.js b/chrome/test/data/webui/test_api.js
index c089715f5644275848e890d3e42625bcad098dc9..1a4841f7c938bfd58ae64cd11bdeda608cf5db75 100644
--- a/chrome/test/data/webui/test_api.js
+++ b/chrome/test/data/webui/test_api.js
@@ -942,6 +942,18 @@ var testing = {};
   }
 
   /**
+   * @param {Function} testFunction
+   * @param {Function=|string=|RegExp=} opt_expected The expected Error
+   *     constructor, partial or complete error message string, or RegExp to
+   *     test the error message.
+   * @param {string=} opt_message Additional error message.
+   * @throws {Error}
+   */
+  function assertThrows(testFunction, opt_expected, opt_message) {
+    chai.assert.throws(testFunction, opt_expected, opt_message);
+  }
+
+  /**
    * Run an accessibility audit on the current page state.
    * @type {Function}
    * @param {Array} a11yResults
@@ -1685,6 +1697,7 @@ var testing = {};
     exports.assertLT = assertLT;
     exports.assertNotEquals = assertNotEquals;
     exports.assertNotReached = assertNotReached;
+    exports.assertThrows = assertThrows;
   }
 
   /**
@@ -1703,6 +1716,7 @@ var testing = {};
     exports.expectNotEquals = createExpect(assertNotEquals);
     exports.expectNotReached = createExpect(assertNotReached);
     exports.expectAccessibilityOk = createExpect(assertAccessibilityOk);
+    exports.expectThrows = createExpect(assertThrows);
   }
 
   /**