Count discardable memory in browsertest

content/child/child_thread_impl_browsertest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/child_thread_impl.h"
 
 #include <stddef.h>
 #include <string.h>
 #include <utility>
 
@@ skipping 76 matching lines @@
   ScopedVector<base::DiscardableMemory> instances;
   for (size_t i = 0; i < kNumberOfInstances; ++i) {
     std::unique_ptr<base::DiscardableMemory> memory =
         child_discardable_shared_memory_manager()
             ->AllocateLockedDiscardableMemory(kLargeSize);
     ASSERT_TRUE(memory);
     void* addr = memory->data();
     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);
+    }
   }
 }
 
 IN_PROC_BROWSER_TEST_F(ChildThreadImplBrowserTest,
                        ReleaseFreeDiscardableMemory) {
   const size_t kSize = 1024 * 1024;  // 1MiB.
 
   std::unique_ptr<base::DiscardableMemory> memory =
       child_discardable_shared_memory_manager()
           ->AllocateLockedDiscardableMemory(kSize);
@@ skipping 14 matching lines @@
     if (!discardable_memory::DiscardableSharedMemoryManager::current()
              ->GetBytesAllocated())
       break;
   }
 
   EXPECT_LT(base::TimeTicks::Now(), end);
 }
 
 }  // namespace
 }  // namespace content