Expose the virtual memory limit to blink

content/child/blink_platform_impl.cc

Index: content/child/blink_platform_impl.cc
diff --git a/content/child/blink_platform_impl.cc b/content/child/blink_platform_impl.cc
index 62669bb648ed3521f2e3d14948e170c85fd011e9..9b2898ea5002a1699295daa5a5c88b746fede85c 100644
--- a/content/child/blink_platform_impl.cc
+++ b/content/child/blink_platform_impl.cc
@@ -943,6 +943,10 @@ size_t BlinkPlatformImpl::physicalMemoryMB() {
   return static_cast<size_t>(base::SysInfo::AmountOfPhysicalMemoryMB());
 }
 
+size_t BlinkPlatformImpl::virtualMemoryLimitMB() {
+  return static_cast<size_t>(base::SysInfo::AmountOfVirtualMemoryMB());
+}
+
 size_t BlinkPlatformImpl::numberOfProcessors() {
   return static_cast<size_t>(base::SysInfo::NumberOfProcessors());
 }