cc::ResourcePool - Re-use larger resources for smaller requests

ui/compositor/compositor.cc

Index: ui/compositor/compositor.cc
diff --git a/ui/compositor/compositor.cc b/ui/compositor/compositor.cc
index 862bc1b92a5dac1b389f279c3dbf0317ad1ca82a..333fe279a10486af4a5667f9efb02ff8e75022c0 100644
--- a/ui/compositor/compositor.cc
+++ b/ui/compositor/compositor.cc
@@ -190,6 +190,9 @@ Compositor::Compositor(const cc::FrameSinkId& frame_sink_id,
   settings.gpu_memory_policy.priority_cutoff_when_visible =
       gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE;
 
+  settings.renderer_settings.disallow_non_exact_resource_reuse =

[danakj, 2017/05/04 21:48:37]

This won't affect layout tests fwiw, but it's fine cuz it could apply for other
types of pixel tests.

But I don't see how the flag is getting to the renderer compositor.

[ericrk, 2017/05/05 23:18:38]

Yup, missed the other half of this. Added it in.

+      command_line->HasSwitch(cc::switches::kDisallowNonExactResourceReuse);
+
   base::TimeTicks before_create = base::TimeTicks::Now();
 
   animation_host_ = cc::AnimationHost::CreateMainInstance();