Fix shared library build after r17368.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index 4b1d33be2118ee096d8932c9268459f9f398af76..357c8a48992bdb157de3df6133ae8abd847f6bc5 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -160,13 +160,13 @@ i::OS::MemoryMappedFile* Shell::counters_file_ = NULL;
 CounterCollection Shell::local_counters_;
 CounterCollection* Shell::counters_ = &local_counters_;
 i::Mutex Shell::context_mutex_;
+const i::TimeTicks Shell::kInitialTicks = i::TimeTicks::HighResolutionNow();
 Persistent<Context> Shell::utility_context_;
 #endif  // V8_SHARED
 
 Persistent<Context> Shell::evaluation_context_;
 ShellOptions Shell::options;
 const char* Shell::kPrompt = "d8> ";
-const i::TimeTicks Shell::kInitialTicks = i::TimeTicks::HighResolutionNow();
 
 
 const int MB = 1024 * 1024;
@@ -290,11 +290,13 @@ int PerIsolateData::RealmFind(Handle<Context> context) {
 }
 
 
+#ifndef V8_SHARED
 // performance.now() returns a time stamp as double, measured in milliseconds.
 void Shell::PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args) {
   i::TimeDelta delta = i::TimeTicks::HighResolutionNow() - kInitialTicks;
   args.GetReturnValue().Set(delta.InMillisecondsF());
 }
+#endif  // V8_SHARED
 
 
 // Realm.current() returns the index of the currently active realm.
@@ -880,10 +882,12 @@ Handle<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
                               RealmSharedGet, RealmSharedSet);
   global_template->Set(String::New("Realm"), realm_template);
 
+#ifndef V8_SHARED
   Handle<ObjectTemplate> performance_template = ObjectTemplate::New();
   performance_template->Set(String::New("now"),
                             FunctionTemplate::New(PerformanceNow));
   global_template->Set(String::New("performance"), performance_template);
+#endif  // V8_SHARED
 
 #if !defined(V8_SHARED) && !defined(_WIN32) && !defined(_WIN64)
   Handle<ObjectTemplate> os_templ = ObjectTemplate::New();