Allow chromedriver to set local state preferences.

chrome/test/webdriver/test/content_setting_test.html

Index: chrome/test/webdriver/test/content_setting_test.html
diff --git a/chrome/test/webdriver/test/content_setting_test.html b/chrome/test/webdriver/test/content_setting_test.html
new file mode 100644
index 0000000000000000000000000000000000000000..aae4e6484dd73bae33db99f63eab1a1c429b1a94
--- /dev/null
+++ b/chrome/test/webdriver/test/content_setting_test.html
@@ -0,0 +1,21 @@
+<script>
+var g_callback = null;
+var g_geoDone = false;
+function waitForGeo(doneCallback) {
+  if (g_geoDone) {
+    doneCallback();
+  } else {
+    g_callback = doneCallback;
+  }
+}
+
+function geoDone() {
+  g_geoDone = true;
+  if (g_callback)
+    g_callback();
+}
+
+// Don't care whether geo succeeds or fails, just whether it gets past the
+// infobar.
+navigator.geolocation.getCurrentPosition(geoDone, geoDone);
+</script>