Move code duplicated in two tests up into the TestingProfile.

Move code duplicated in two tests up into the TestingProfile.

Move TestURLRequestContextGetter and friends from CookieTreeModelTest and
CookiesWindowControllerTest into TestingProfile. In the TestingProfile, return
a valid CookieMonster and URLRequstContextGetter, if CreateRequestContext() is
called.

Original CL: http://codereview.chromium.org/525072/show

BUG=None
TEST=Covered by unit tests

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=35776

[Robert Sesek, 2010-01-08 03:09:54]

This fixes issues with the original CL. A Context is now only created if it is
explicitly asked for. Doing so implicitly had unintended consequences and broke
the build.

[John Grabowski, 2010-01-08 04:01:55]

LGTM

It can be tricky to change test infrastructure given the large amount of
dependancies.  Nevertheless, this is a good fix.

http://codereview.chromium.org/525106/diff/1/5
File chrome/test/testing_profile.h (right):

http://codereview.chromium.org/525106/diff/1/5#newcode105
chrome/test/testing_profile.h:105: net::CookieMonster* GetCookieMonster() {
Add comment with reference to CreateRequestContext() being needed first if you
want this, and that it's not done on-demand because....