Remove SkiaBenchmarking bitmap size limits.

Some websites can easily blow through the current 4096 limit. Instead of
imposing an arbitrary limit, let Skia attempt to allocate and handle
potential failures.

BUG=338865
R=nduca@chromium.org,pdr@chromium.org,piman@chromium.org

Review URL: https://codereview.chromium.org/145243005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248627 0039d316-1c4b-4281-b951-d872f2087c98
BrowserPlugin: Cleanup ChildFrameCompositingHelper and fix lifetime issue

ChildFrameCompositingHelper had a raw pointer to WebPluginContainer, and
BrowserPluginManager, which is not safe. In another patch,
see https://codereview.chromium.org/140073002/, there is an access to the
container after it is deleted, which is causing a use-after-free
crash on the win_rel bot.

BUG=334531

Review URL: https://codereview.chromium.org/133233012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248628 0039d316-1c4b-4281-b951-d872f2087c98
Default copies value should be '1'.
Print preview renderer expects valid integer in print ticket.

According https://developers.google.com/cloud-print/docs/cdd#Copies
  "copies" :{ }
is the same as 
  "copies" :{ "default": 1 }

BUG=340342

Review URL: https://codereview.chromium.org/144483010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248629 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248629