Merge 281795 "base: Add soft memory limit to DiscardableMemoryMa..."

base/memory/discardable_memory_linux.cc

Index: base/memory/discardable_memory_linux.cc
===================================================================
--- base/memory/discardable_memory_linux.cc	(revision 283285)
+++ base/memory/discardable_memory_linux.cc	(working copy)
@@ -21,6 +21,11 @@
 }
 
 // static
+bool DiscardableMemory::ReduceMemoryUsage() {
+  return internal::DiscardableMemoryEmulated::ReduceMemoryUsage();
+}
+
+// static
 void DiscardableMemory::GetSupportedTypes(
     std::vector<DiscardableMemoryType>* types) {
   const DiscardableMemoryType supported_types[] = {