Move GeolocationDispatcher into blink.

third_party/WebKit/LayoutTests/fast/dom/Geolocation/script-tests/cached-position-called-once.js

 description('Tests that when a cached position is available the callback for getCurrentPosition is called only once. This is a regression test for http://crbug.com/311876 .');
 
 if (!window.testRunner || !window.internals)
     debug('This test can not run without testRunner or internals');
 
 internals.setGeolocationClientMock(document);
 internals.setGeolocationPosition(document, 31.478, -0.166, 100);
 internals.setGeolocationPermission(document, true);
 
 // Only one success callback should be reported per call to getCurrentPosition.
@@ skipping 16 matching lines @@
                     reportCallback(true, id);
                 },
                 function(error) {
                     reportCallback(false, id);
                 },
                 { maximumAge:600000, timeout:0 });
     };
     setTimeout(fn, milliseconds);
 }
 
-// The test terminates at the 3rd reported callback. If the bug still exists
-// this happens after the 2nd call to getCurrentPosition, one of them is a
-// repeat of the first.
-getPosition(0);
-getPosition(100);
-getPosition(200);
+// Make a geolocation request to populate the cached value so requests with a
+// timeout of 0 can succeed.
+navigator.geolocation.getCurrentPosition(function(position) {
+    // The test terminates at the 3rd reported callback. If the bug still exists
+    // this happens after the 2nd call to getCurrentPosition, one of them is a
+    // repeat of the first.
+    getPosition(0);
+    getPosition(100);
+    getPosition(200);
+}, function(error) {
+    testFailed('Error callback invoked unexpectedly');
+});
 
 window.jsTestIsAsync = true;