Support different formats in the same resource pool.

cc/resources/gpu_rasterizer.cc

Index: cc/resources/gpu_rasterizer.cc
diff --git a/cc/resources/gpu_rasterizer.cc b/cc/resources/gpu_rasterizer.cc
index fe1025c11494638796ed59056395cfa3fe8ea2ee..beb854cfb3d20e1245fd73542d1a550dfe8ca668 100644
--- a/cc/resources/gpu_rasterizer.cc
+++ b/cc/resources/gpu_rasterizer.cc
@@ -68,7 +68,8 @@ void GpuRasterizer::RasterizeTiles(
     // TODO(hendrikw): Don't create resources for solid color tiles.
     // See crbug.com/445919
     scoped_ptr<ScopedResource> resource =
-        resource_pool->AcquireResource(tile->desired_texture_size());
+        resource_pool->AcquireResource(tile->desired_texture_size(),
+                                       FORMAT_USAGE_NATIVE);
     const ScopedResource* const_resource = resource.get();
 
     RasterSource::SolidColorAnalysis analysis;