[ChromeOS] Do not send the memory pressure notification from chrome to renderers

chrome/browser/memory/tab_manager_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/memory/tab_manager.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 433 matching lines @@
 
 // Function that simply parrots back an externally specified memory pressure
 // level.
 MemoryPressureLevel ReturnSpecifiedPressure(
     const MemoryPressureLevel* level) {
   return *level;
 }
 
 }  // namespace
 
+// ChildProcessNotification is disabled on Chrome OS. crbug.com/588172.
+#if defined(OS_CHROMEOS)
+#define MAYBE_ChildProcessNotifications DISABLED_ChildProcessNotifications
+#else
+#define MAYBE_ChildProcessNotifications ChildProcessNotifications
+#endif
+
 // Ensure that memory pressure notifications are forwarded to child processes.
-TEST_F(TabManagerTest, ChildProcessNotifications) {
+TEST_F(TabManagerTest, MAYBE_ChildProcessNotifications) {
   TabManager tm;
 
   // Set up the tab strip.
   TabStripDummyDelegate delegate;
   TabStripModel tabstrip(&delegate, profile());
 
   // Create test clock, task runner.
   base::SimpleTestTickClock test_clock;
   MockTaskRunner mock_task_runner;
   scoped_refptr<TaskRunnerProxy> task_runner(
@@ skipping 119 matching lines @@
   EXPECT_EQ(0u, task_runner->size());
   EXPECT_EQ(0u, tm.notified_renderers_.size());
 
 
   // Clean up the tabstrip.
   tabstrip.CloseAllTabs();
   ASSERT_TRUE(tabstrip.empty());
 }
 
 }  // namespace memory