Count discardable memory in browsertest

content/child/child_thread_impl_browsertest.cc

Index: content/child/child_thread_impl_browsertest.cc
diff --git a/content/child/child_thread_impl_browsertest.cc b/content/child/child_thread_impl_browsertest.cc
index ab21ddd453db3b28c0b4f633d8fea71ae7c32a29..7b504f92dec21e06aa9bf08cea8685043903394e 100644
--- a/content/child/child_thread_impl_browsertest.cc
+++ b/content/child/child_thread_impl_browsertest.cc
@@ -94,6 +94,17 @@ IN_PROC_BROWSER_TEST_F(ChildThreadImplBrowserTest,
     ASSERT_NE(nullptr, addr);
     memory->Unlock();
     instances.push_back(std::move(memory));
+
+    if (i % 10 == 0) {
+      size_t s = 0;
+      for (auto& m : instances) {
+        if (m->Lock()) {
+          s += kLargeSize;
+          m->Unlock();
+        }
+      }
+      fprintf(stderr, "EEE s=%luMB\n", s / 1024/1024);
+    }
   }
 }