Use Chrome compatible naming for compiler specifics.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 6ae2ceb8a298ec99d33b1f92a5a7a17f847dbb21..819db82ae462a61ebbfbe63a4f3b29c60547c538 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1529,13 +1529,13 @@ class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
 
 class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
  public:
-  virtual void* Allocate(size_t) V8_OVERRIDE {
+  virtual void* Allocate(size_t) OVERRIDE {
     return malloc(0);
   }
-  virtual void* AllocateUninitialized(size_t length) V8_OVERRIDE {
+  virtual void* AllocateUninitialized(size_t length) OVERRIDE {
     return malloc(0);
   }
-  virtual void Free(void* p, size_t) V8_OVERRIDE {
+  virtual void Free(void* p, size_t) OVERRIDE {
     free(p);
   }
 };