Use 'local-exec' for threadlocal_heap_ in tcmalloc.

base/process/memory_unittest.cc

Index: base/process/memory_unittest.cc
diff --git a/base/process/memory_unittest.cc b/base/process/memory_unittest.cc
index 0be2d4400633ba75101423e4a452891ddb87d9aa..91344f272272dece33fc8ec1f9f178a15b36f99e 100644
--- a/base/process/memory_unittest.cc
+++ b/base/process/memory_unittest.cc
@@ -280,6 +280,7 @@ TEST_F(OutOfMemoryDeathTest, Memalign) {
     }, kOomRegex);
 }
 
+#if defined(COMPONENT_BUILD)
 TEST_F(OutOfMemoryDeathTest, ViaSharedLibraries) {
   // This tests that the run-time symbol resolution is overriding malloc for
   // shared libraries as well as for our code.
@@ -288,6 +289,7 @@ TEST_F(OutOfMemoryDeathTest, ViaSharedLibraries) {
     value_ = MallocWrapper(test_size_);
   }, kOomRegex);
 }
+#endif
 #endif  // OS_LINUX
 
 // Android doesn't implement posix_memalign().