metrics: Connect leak detector to allocator

components/metrics/leak_detector/leak_detector_unittest.cc

Index: components/metrics/leak_detector/leak_detector_unittest.cc
diff --git a/components/metrics/leak_detector/leak_detector_unittest.cc b/components/metrics/leak_detector/leak_detector_unittest.cc
index a134a17b130bc2000c659e12f28c0890b580ca8e..34541fed34ed64cfea3b9ab1a0e35f4dd67fd041 100644
--- a/components/metrics/leak_detector/leak_detector_unittest.cc
+++ b/components/metrics/leak_detector/leak_detector_unittest.cc
@@ -6,6 +6,7 @@
 
 #include <set>
 
+#include "base/allocator/allocator_extension.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/test/test_browser_thread_bundle.h"
@@ -78,6 +79,11 @@ class LeakDetectorTest : public ::testing::Test {
   DISALLOW_COPY_AND_ASSIGN(LeakDetectorTest);
 };
 
+TEST_F(LeakDetectorTest, AllocatorHooks) {
+  EXPECT_EQ(&LeakDetector::AllocHook, base::allocator::GetSingleAllocHook());
+  EXPECT_EQ(&LeakDetector::FreeHook, base::allocator::GetSingleFreeHook());
+}
+
 TEST_F(LeakDetectorTest, NotifyObservers) {
   // Generate two sets of leak reports.
   std::vector<LeakReport> reports1(3);