only do linux pvalloc OutOfMemoryDeathTest on non-tcmalloc glibc builds

base/process/memory.h

 // Copyright (c) 2013 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.
 
 #ifndef BASE_PROCESS_MEMORY_H_
 #define BASE_PROCESS_MEMORY_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/process/process_handle.h"
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
+#ifdef PVALLOC_AVAILABLE
+// Build config explicitly tells us whether or not pvalloc is available.
+#elif defined(LIBC_GLIBC) && !defined(USE_TCMALLOC)
+#define PVALLOC_AVAILABLE 1
+#else
+#define PVALLOC_AVAILABLE 0
+#endif
+
 namespace base {
 
 // Enables low fragmentation heap (LFH) for every heaps of this process. This
 // won't have any effect on heaps created after this function call. It will not
 // modify data allocated in the heaps before calling this function. So it is
 // better to call this function early in initialization and again before
 // entering the main loop.
 // Note: Returns true on Windows 2000 without doing anything.
 BASE_EXPORT bool EnableLowFragmentationHeap();
 
@@ skipping 34 matching lines @@
 //
 // IF YOU USE THIS WITHOUT CONSULTING YOUR FRIENDLY OSX DEVELOPER,
 // YOUR CODE IS LIKELY TO BE REVERTED.  THANK YOU.
 BASE_EXPORT void* UncheckedMalloc(size_t size);
 BASE_EXPORT void* UncheckedCalloc(size_t num_items, size_t size);
 #endif  // defined(OS_MACOSX)
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_MEMORY_H_