Re-land: base: Implement browser process support for discardable memory.

chrome/test/base/chrome_unit_test_suite.h

Index: chrome/test/base/chrome_unit_test_suite.h
diff --git a/chrome/test/base/chrome_unit_test_suite.h b/chrome/test/base/chrome_unit_test_suite.h
index a8bb20886f92fc5e973d0bb318d90cc48ef1b61f..404c59f0a68e541e176db52e9650e9d93f2a12ee 100644
--- a/chrome/test/base/chrome_unit_test_suite.h
+++ b/chrome/test/base/chrome_unit_test_suite.h
@@ -8,6 +8,7 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
+#include "base/test/test_discardable_memory_shmem_allocator.h"
 #include "chrome/test/base/chrome_test_suite.h"
 
 // Test suite for unit tests. Creates additional stub services that are not
@@ -28,6 +29,7 @@ class ChromeUnitTestSuite : public ChromeTestSuite {
   static void InitializeResourceBundle();
 
  private:
+  base::TestDiscardableMemoryShmemAllocator discardable_memory_allocator_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeUnitTestSuite);
 };