cc: Fix passing initialized value to getInteger
Context3d verifies that argument to getInteger are cleared, which may
not be the case in ResourceProvider::InitializeGL after switching modes
or context loss.
The check looks something like:
[ERROR_REPORT:gles2_implementation_impl_autogen.h(591)] Check failed:
params && (params[0] == static_cast<GLint>(0) || params[0] ==
static_cast<GLint>(-1)).
Fix by resetting it to 0 before getInteger.
BUG=
Review URL: https://codereview.chromium.org/
105303002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@238788 0039d316-1c4b-4281-b951-d872f2087c98