Clear in-memory cache after adding or deleting an event handler to ensure it is effective

Clear in-memory cache after adding or deleting an event handler to ensure it is effective

We need to clear WebKit's in-memory cache after adding an event handler to be sure that when reloading a site the new event handler is active. 

BUG=none
TEST=no


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=112841

[battre, 2011-12-02 21:53:56]

please review. thx.

[Matt Perry, 2011-12-02 21:58:23]

lgtm

[commit-bot: I haz the power, 2011-12-02 23:52:05]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/battre@chromium.org/8772058/1

[commit-bot: I haz the power, 2011-12-03 01:42:18]

Change committed as 112841