Add GCController support to test_shell....

Add GCController support to test_shell.

This is done in the binding layer, GCController is a JS object,
GCController.collect() is a JS function which calls gc().

GCController object can be enabled by calling 
ScriptController::setShouldExposeGCController(true);

GCController.collect() needs V8 expose gc function, which is controlled
by a flag '--expose-gc'. Otherwise GCController.collect() has no effect.

By default, test_shell exposes both gc function and GCController object.


Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=5482

[Mike Belshe, 2008-11-14 01:11:54]

lgtm

http://codereview.chromium.org/10719/diff/1/3
File webkit/port/bindings/v8/v8_proxy.cpp (right):

http://codereview.chromium.org/10719/diff/1/3#newcode1836
Line 1836: "     function() {if (v8_gc) v8_gc(); };"
Cool - in JS! 

Could this be just:

if (gc)
  gc();

?

Why is the intermediate v8_gc needed?

[darin (slow to review), 2008-11-14 01:34:17]

Clever.  Thanks, LGTM