content: Add DeletedDiscardableSharedMemory IPC.

content/child/child_discardable_shared_memory_manager_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 "base/bind.h"
 #include "base/command_line.h"
 #include "content/child/child_discardable_shared_memory_manager.h"
 #include "content/child/child_thread_impl.h"
 #include "content/common/host_discardable_shared_memory_manager.h"
 #include "content/public/common/content_switches.h"
@@ skipping 93 matching lines @@
         memory.get()));
   }
 
   for (auto& memory : instances) {
     PostTaskToInProcessRendererAndWait(
         base::Bind(&ChildDiscardableSharedMemoryManagerBrowserTest::FreeMemory,
                    base::Passed(&memory)));
   }
 }
 
+IN_PROC_BROWSER_TEST_F(ChildDiscardableSharedMemoryManagerBrowserTest,
+                       DISABLED_ReleaseFreeMemory) {
+  const size_t kSize = 1024 * 1024;  // 1MiB.
+
+  NavigateToURL(shell(), GURL(url::kAboutBlankURL));
+
+  scoped_ptr<base::DiscardableMemoryShmemChunk> memory;
+  PostTaskToInProcessRendererAndWait(base::Bind(
+      &ChildDiscardableSharedMemoryManagerBrowserTest::AllocateLockedMemory,
+      kSize, &memory));
+  PostTaskToInProcessRendererAndWait(
+      base::Bind(&ChildDiscardableSharedMemoryManagerBrowserTest::UnlockMemory,
+                 memory.get()));
+  PostTaskToInProcessRendererAndWait(
+      base::Bind(&ChildDiscardableSharedMemoryManagerBrowserTest::FreeMemory,
+                 base::Passed(&memory)));
+
+  EXPECT_GE(HostDiscardableSharedMemoryManager::current()->GetBytesAllocated(),
+            kSize);
+
+  PostTaskToInProcessRendererAndWait(base::Bind(
+      &ChildDiscardableSharedMemoryManagerBrowserTest::ReleaseFreeMemory));
+
+  EXPECT_EQ(HostDiscardableSharedMemoryManager::current()->GetBytesAllocated(),
+            0u);
+}
+
 }  // content