Bug 1074911 - Replace JS_ASSERT by MOZ_ASSERT. r=jorendorff

Apply the following script

sed -i '
   /JS_ASSERT(/ {
     s/JS_ASSERT(/MOZ_ASSERT(/;
     :b;
     s/ \\$/\\/;
     /;/ { p; d; };
     n;
     s/^/ /;
     b b;
  };
  s/JS_ASSERT (/MOZ_ASSERT(/;
'

Except where the JS_ASSERT macro does not end with a semi-colon, where empty
lines are in the middle of the macro, and where the backslahes are always the
same-length after the expression.

js/ipc/JavaScriptShared.cpp

@@ -418,7 +418,7 @@ JavaScriptShared::fromDescriptor(JSContext *cx, Handle<JSPropertyDescriptor> des
     if (!toVariant(cx, desc.value(), &out->value()))
         return false;
 
-    JS_ASSERT(desc.object());
+    MOZ_ASSERT(desc.object());
     if (!toObjectVariant(cx, desc.object(), &out->obj()))
         return false;