[DevTools] Fill ExceptionDetails with more details, unify usage across protocol.

chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js

Index: chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js
diff --git a/chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js b/chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js
index c0c65505e522aef830ab6b16686905af28799053..58acb6351d9ac5ced5d008989239901f6bbe520b 100644
--- a/chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js
+++ b/chrome/test/data/extensions/api_test/uncaught_exception_logging/test.js
@@ -6,7 +6,8 @@ function createTestFunction(expected_message) {
   return function(tab) {
     function onDebuggerEvent(debuggee, method, params) {
       if (debuggee.tabId == tab.id && method == 'Runtime.exceptionThrown') {
-        if (params.exception.value.indexOf(expected_message) > -1) {
+        var exception = params.exceptionDetails.exception;
+        if (exception.value.indexOf(expected_message) > -1) {
           chrome.debugger.onEvent.removeListener(onDebuggerEvent);
           chrome.test.succeed();
         }