Allow assertions to be enabled in Blink Release builds.

Source/wtf/ThreadRestrictionVerifier.h

Index: Source/wtf/ThreadRestrictionVerifier.h
diff --git a/Source/wtf/ThreadRestrictionVerifier.h b/Source/wtf/ThreadRestrictionVerifier.h
index e62261ca7429c3b954d8402fcfb28242e6821a0e..c8f8437e08e51a4d5155b2eca5c9aa158a6b6ac6 100644
--- a/Source/wtf/ThreadRestrictionVerifier.h
+++ b/Source/wtf/ThreadRestrictionVerifier.h
@@ -31,9 +31,10 @@
 #ifndef ThreadRestrictionVerifier_h
 #define ThreadRestrictionVerifier_h
 
-#ifndef NDEBUG
-
 #include "wtf/Assertions.h"
+
+#if ENABLE(ASSERT)
+
 #include "wtf/Threading.h"
 
 namespace WTF {
@@ -53,9 +54,7 @@ public:
     // Indicates that the object may (or may not) be owned by more than one place.
     void setShared(bool shared)
     {
-#if ASSERT_ENABLED

[Ken Russell (switch to Gerrit), 2014/07/15 23:25:35]

This entire file was essentially guarded under ASSERT_ENABLED so this #if was
redundant.

         bool previouslyShared = m_shared;
-#endif
         m_shared = shared;
 
         if (!m_shared)