Replacing the OVERRIDE with override in tools folder

tools/android/heap_profiler/heap_profiler_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 <stdint.h>
 #include <string.h>
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "tools/android/heap_profiler/heap_profiler.h"
 
 namespace {
 
 class HeapProfilerTest : public testing::Test {
  public:
-  virtual void SetUp() OVERRIDE { heap_profiler_init(&stats_); }
+  virtual void SetUp() override { heap_profiler_init(&stats_); }
 
-  virtual void TearDown() OVERRIDE {
+  virtual void TearDown() override {
     CheckAllocVsStacktaceConsistency();
     heap_profiler_cleanup();
   }
 
  protected:
   struct StackTrace {
     uintptr_t frames[HEAP_PROFILER_MAX_DEPTH];
     size_t depth;
   };
 
@@ skipping 419 matching lines @@
   EXPECT_EQ(4096, stats_.total_alloc_bytes);
 
   heap_profiler_free((void*)0xfffffffffffff000L, 4096, NULL);
   EXPECT_EQ(0, stats_.num_allocs);
   EXPECT_EQ(0, stats_.num_stack_traces);
   EXPECT_EQ(0, stats_.total_alloc_bytes);
 }
 #endif
 
 }  // namespace