cc: Fix aborted commits with evicted textures

cc/trees/layer_tree_host_unittest_animation.cc

Index: cc/trees/layer_tree_host_unittest_animation.cc
diff --git a/cc/trees/layer_tree_host_unittest_animation.cc b/cc/trees/layer_tree_host_unittest_animation.cc
index 703ad75bb7fa85dd1d9619ee31591af2193ffa47..dbc427504d846299a8e807775e72974eb38f396f 100644
--- a/cc/trees/layer_tree_host_unittest_animation.cc
+++ b/cc/trees/layer_tree_host_unittest_animation.cc
@@ -270,6 +270,8 @@ class LayerTreeHostAnimationTestTickAnimationWhileBackgrounded
   virtual void WillAnimateLayers(
       LayerTreeHostImpl* host_impl,
       base::TimeTicks monotonic_time) OVERRIDE {
+    // Verify that the host can draw, it's just not visible.
+    EXPECT_TRUE(host_impl->CanDraw());

[enne (OOO), 2013/08/06 21:41:21]

This test started failing because of the changes to PrioritizedResourceManager. 
Previously SetVisible(false) => SetMemory => set resources evicted (even if
nothing had) => can draw is false => OnCanDrawChanged triggers animation tick.

Since only the visibility flag changed (but not CanDraw) with the
PrioritizedResourceManager changed, this wasn't ticking animations.  I changed
the test to verify that only visibility would cause animation ticks.

To make this start passing again, I modified both proxies to update animation
ticking when visibility changed.

     if (num_animates_ < 2) {
       if (!num_animates_) {
         // We have a long animation running. It should continue to tick even