Prevent extensions from clobbering JSON implementation that extension calls use

BUG=38857
TEST=none

Review URL: http://codereview.chromium.org/2387002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@48667 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 32 insertions, 0 deletions

diff --git a/chrome/test/data/extensions/api_test/messaging/connect/page.js b/chrome/test/data/extensions/api_test/messaging/connect/page.js
index b876f7e..9d45f64 100644
--- a/chrome/test/data/extensions/api_test/messaging/connect/page.js
+++ b/chrome/test/data/extensions/api_test/messaging/connect/page.js
@@ -1,3 +1,19 @@
+JSON.parse = function() {
+  return "JSON.parse clobbered by content script.";
+}
+
+JSON.stringify = function() {
+  return "JSON.stringify clobbered by content script.";
+}
+
+Array.prototype.toJSON = function() {
+  return "Array.prototype.toJSON clobbered by content script.";
+}
+
+Object.prototype.toJSON = function() {
+  return "Object.prototype.toJSON clobbered by content script.";
+}
+
 // For complex connect tests.
 chrome.extension.onConnect.addListener(function(port) {
   console.log('connected');
diff --git a/chrome/test/data/extensions/api_test/messaging/connect/test.html b/chrome/test/data/extensions/api_test/messaging/connect/test.html
index 3e24916..4983a75 100644
--- a/chrome/test/data/extensions/api_test/messaging/connect/test.html
+++ b/chrome/test/data/extensions/api_test/messaging/connect/test.html
@@ -1,4 +1,20 @@
 <script>
+JSON.parse = function() {
+  return "JSON.parse clobbered by extension.";
+}
+
+JSON.stringify = function() {
+  return "JSON.stringify clobbered by extension.";
+}
+
+Array.prototype.toJSON = function() {
+  return "Array.prototype.toJSON clobbered by extension.";
+}
+
+Object.prototype.toJSON = function() {
+  return "Object.prototype.toJSON clobbered by extension.";
+}
+
 // Keep track of the tab that we're running tests in, for simplicity.
 var testTab = null;