  We present cross-correlation analyses of simultaneous X-ray and near-infrared
(near-IR) observations of the microquasar GRS 1915+105 during relativistic
jet-producing epochs (X-ray class $\alpha$ and $\beta$). While previous studies
have linked the large-amplitude IR flares and X-ray behaviors to jet formation
in these states, our new analyses are sensitive to much lower-amplitude IR
variability, providing more sensitive probes of the jet formation process. The
X-ray to IR cross-correlation function (CCF) shows significant correlations
which vary in form between the different X-ray states. During low/hard dips in
both classes, we find no significant X-ray/IR correlation. During
high-variability epochs, we find consistently significant correlations in both
$\alpha$ and $\beta$ classes, but with strong differences in the CCF structure.
The high-variability $\alpha$ CCF shows strong anti-correlation between
X-ray/IR, with the X-ray preceding the IR by $\sim$ 13 $\pm$ 2s. The
high-variability $\beta$ state shows time-variable CCF structure, which is
statistically significant but without a clearly consistent lag. Our simulated
IR light curves, designed to match the observed CCFs, show variably-flickering
IR emission during the class $\beta$ high-variability epoch, while the class
$\alpha$ can be fit by IR flickering with frequencies in the range 0.1 to 0.3
Hz, strengthening $\sim$10 s after every X-ray subflare. We interpret these
features in the context of the X-ray-emitting accretion disk and IR emission
from relativistic jet formation in GRS 1915+105, concluding that the CCF
analysis places the origin in a synchrotron-emitting relativistic compact jet
at a distance from the compact object of $\sim$0.02AU.
