Google doesn't need China; even the Nexus One is made in Taiwan. Unlike most other large companies (and all governments), they're in an excellent position to call out the Chinese government.
How long do you think Taiwan is going to last as an autonomous entity, now that it can no longer rely on the US for military support, because the US is in hock to the PRC?
The PRC owns many pieces of paper. Attacking Taiwan would be an excellent reason to repudiate the value of that paper.
That would be great - imagine if everyone worked like that. How would anyone ever collect on their loans? I owe you $50? Well, you hit my cousin the other day...
How long do you think Taiwan is going to last as an autonomous entity, now that it can no longer rely on the US for military support, because the US is in hock to the PRC?
The US was just as much in hock to the PRC in 1996, when Clinton decided to sail a few aircraft carriers through the Taiwan Straits. After that, the PRC lost their taste for attacking Taiwan.
The reintegration of Taiwan will happen through a political arrangement between the CPC and the KMT, not through war.
This is even worse than your earlier point about Chinese dumping dollars. The PRC would barely be able to invade Taiwan right now even without US aid. Worse for your point is that the US could screw over the PRC without firing a shot simply by repudiating the debt the Chinese hold.