Fix typo.

TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/23710023

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16638 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/platform/virtual-memory.h

@@ -39,8 +39,8 @@ namespace internal {
 //
 // This class represents and controls an area of reserved memory.
 // Control of the reserved memory can be assigned to another VirtualMemory
-// object by assignment or contructing. This removes the reserved memory from
-// the original object.
+// object by assignment or copy-constructing. This removes the reserved memory
+// from the original object.
 class VirtualMemory V8_FINAL {
  public:
   // The executability of a memory region.