Make EventHandler::ActiveIntervalTimer mockable.

Source/core/testing/Internals.idl

Index: Source/core/testing/Internals.idl
diff --git a/Source/core/testing/Internals.idl b/Source/core/testing/Internals.idl
index 27232a25ed4e83a458cb9f469b3739b90057bca0..b604d5ae2a196901846a93db4bcf0610f678e590 100644
--- a/Source/core/testing/Internals.idl
+++ b/Source/core/testing/Internals.idl
@@ -133,6 +133,10 @@
     [RaisesException] Node touchNodeAdjustedToBestContextMenuNode(long x, long y, long width, long height, Document document);
     [RaisesException] ClientRect bestZoomableAreaForTouchPoint(long x, long y, long width, long height, Document document);
 
+    [RaisesException] void suspendActiveIntervalTimer(Document document);

[Rick Byers, 2014/01/10 21:46:50]

combining suspend and resume into a single
'setActiveIntervalTimerSuspended(Document, bool)' function would be more
consistent with other APIs here (Eg. see all the set...Enabled functions that
take a bool to enable and disable).

[Zeeshan Qureshi, 2014/01/10 22:20:41]

Sorry, I didn't pay attention to the surrounding code. Also, how about using
name similar to the timer function i.e. setActiveIntervalTimerInManualMode?

[Rick Byers, 2014/01/10 22:24:36]

Sure, sounds good!

+    [RaisesException] void resumeActiveIntervalTimer(Document document);
+    [RaisesException] void fireActiveIntervalTimer(Document document);
+
     [RaisesException] long lastSpellCheckRequestSequence(Document document);
     [RaisesException] long lastSpellCheckProcessedSequence(Document document);