That might be the entire mobile ecosystem (although that sounds too simplistic, still, you are forgetting Linaro), but the ARM ecosystem also includes M-profile (deep embedded), R-profile (RTOS) and server-class (SBSA and "almost" designs like Octeon-TX and Tegra X1). The ARM server ecosystem is most definitely a bunch of software and hardware players, and Google is not a significant presence there FWIW.