Improve grammar in some comments.

base/memory/memory_pressure_monitor_chromeos_unittest.cc

 // Copyright 2014 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/memory/memory_pressure_monitor_chromeos.h"
 
 #include "base/macros.h"
 #include "base/memory/memory_pressure_listener.h"
 #include "base/message_loop/message_loop.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 94 matching lines @@
     monitor->CheckMemoryPressureForTest();
     message_loop.RunUntilIdle();
     EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE,
               monitor->GetCurrentPressureLevel());
     if (WasOnMemoryPressureCalled()) {
       EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE,
                 on_memory_pressure_level);
       break;
     }
   }
-  // Should be more then 5 and less then 100.
+  // Should be more than 5 and less than 100.
   EXPECT_LE(5, i);
   EXPECT_GE(99, i);
 
   // Setting the memory usage to 99% should produce critical levels.
   monitor->SetMemoryInPercentOverride(99);
   monitor->CheckMemoryPressureForTest();
   message_loop.RunUntilIdle();
   EXPECT_TRUE(WasOnMemoryPressureCalled());
   EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL,
             on_memory_pressure_level);
@@ skipping 31 matching lines @@
                 on_memory_pressure_level);
       break;
     }
   }
   // We should have needed exactly the same amount of checks as before.
   EXPECT_EQ(j, i);
 }
 
 }  // namespace chromeos
 }  // namespace base