Use new skia resource clearing API

cc/output/context_cache_controller.cc

Index: cc/output/context_cache_controller.cc
diff --git a/cc/output/context_cache_controller.cc b/cc/output/context_cache_controller.cc
index de178771aeef81048d5d4e71aaf106d0c464bdc4..6bdc85320d0610581f02f0d85ee3c9fa042fb472 100644
--- a/cc/output/context_cache_controller.cc
+++ b/cc/output/context_cache_controller.cc
@@ -159,8 +159,9 @@ void ContextCacheController::OnIdle(uint32_t idle_generation) {
     return;
   }
 
-  if (gr_context_)
-    gr_context_->freeGpuResources();
+  if (gr_context_) {
+    gr_context_->purgeResourcesNotUsedInMs(std::chrono::milliseconds(0));
+  }
 
   // Toggle SetAggressivelyFreeResources to drop command buffer data.
   context_support_->SetAggressivelyFreeResources(true);