Revert of discardable_memory: Using mojo IPC to replace Chrome IPC

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
new file mode 100644
index 0000000000000000000000000000000000000000..ab21ddd453db3b28c0b4f633d8fea71ae7c32a29
--- /dev/null
+++ b/content/child/child_thread_impl_browsertest.cc
@@ -0,0 +1,130 @@
+// 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>
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/memory/discardable_memory.h"
+#include "base/memory/scoped_vector.h"
+#include "base/time/time.h"
+#include "components/discardable_memory/client/client_discardable_shared_memory_manager.h"
+#include "components/discardable_memory/service/discardable_shared_memory_manager.h"
+#include "content/child/child_gpu_memory_buffer_manager.h"
+#include "content/public/common/content_switches.h"
+#include "content/public/test/content_browser_test.h"
+#include "content/public/test/content_browser_test_utils.h"
+#include "content/shell/browser/shell.h"
+#include "gpu/ipc/client/gpu_memory_buffer_impl.h"
+#include "ui/gfx/buffer_format_util.h"
+#include "url/gurl.h"
+
+namespace content {
+namespace {
+
+class ChildThreadImplBrowserTest : public ContentBrowserTest {
+ public:
+  ChildThreadImplBrowserTest()
+      : child_discardable_shared_memory_manager_(nullptr) {}
+
+  // Overridden from BrowserTestBase:
+  void SetUpCommandLine(base::CommandLine* command_line) override {
+    command_line->AppendSwitch(switches::kSingleProcess);
+  }
+  void SetUpOnMainThread() override {
+    NavigateToURL(shell(), GURL(url::kAboutBlankURL));
+    PostTaskToInProcessRendererAndWait(
+        base::Bind(&ChildThreadImplBrowserTest::SetUpOnChildThread,
+                   base::Unretained(this)));
+  }
+
+  discardable_memory::ClientDiscardableSharedMemoryManager*
+  child_discardable_shared_memory_manager() {
+    return child_discardable_shared_memory_manager_;
+  }
+
+ private:
+  void SetUpOnChildThread() {
+    child_discardable_shared_memory_manager_ =
+        ChildThreadImpl::current()->discardable_shared_memory_manager();
+  }
+
+  discardable_memory::ClientDiscardableSharedMemoryManager*
+      child_discardable_shared_memory_manager_;
+};
+
+IN_PROC_BROWSER_TEST_F(ChildThreadImplBrowserTest, LockDiscardableMemory) {
+  const size_t kSize = 1024 * 1024;  // 1MiB.
+
+  std::unique_ptr<base::DiscardableMemory> memory =
+      child_discardable_shared_memory_manager()
+          ->AllocateLockedDiscardableMemory(kSize);
+
+  ASSERT_TRUE(memory);
+  void* addr = memory->data();
+  ASSERT_NE(nullptr, addr);
+
+  memory->Unlock();
+
+  // Purge all unlocked memory.
+  discardable_memory::DiscardableSharedMemoryManager::current()->SetMemoryLimit(
+      0);
+
+  // Should fail as memory should have been purged.
+  EXPECT_FALSE(memory->Lock());
+}
+
+IN_PROC_BROWSER_TEST_F(ChildThreadImplBrowserTest,
+                       DiscardableMemoryAddressSpace) {
+  const size_t kLargeSize = 4 * 1024 * 1024;   // 4MiB.
+  const size_t kNumberOfInstances = 1024 + 1;  // >4GiB total.
+
+  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));
+  }
+}
+
+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);
+
+  EXPECT_TRUE(memory);
+  memory.reset();
+
+  EXPECT_GE(discardable_memory::DiscardableSharedMemoryManager::current()
+                ->GetBytesAllocated(),
+            kSize);
+
+  child_discardable_shared_memory_manager()->ReleaseFreeMemory();
+
+  // Busy wait for host memory usage to be reduced.
+  base::TimeTicks end =
+      base::TimeTicks::Now() + base::TimeDelta::FromSeconds(5);
+  while (base::TimeTicks::Now() < end) {
+    if (!discardable_memory::DiscardableSharedMemoryManager::current()
+             ->GetBytesAllocated())
+      break;
+  }
+
+  EXPECT_LT(base::TimeTicks::Now(), end);
+}
+
+}  // namespace
+}  // namespace content