Fixes tests that use internals.observeGC to work with Ignition.

third_party/WebKit/LayoutTests/resources/observeGCWrapper.js

Index: third_party/WebKit/LayoutTests/resources/observeGCWrapper.js
diff --git a/third_party/WebKit/LayoutTests/resources/observeGCWrapper.js b/third_party/WebKit/LayoutTests/resources/observeGCWrapper.js
new file mode 100644
index 0000000000000000000000000000000000000000..da8d831619bd9edbff74cb1b6017fff47bd5944f
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/resources/observeGCWrapper.js
@@ -0,0 +1,3 @@
+function callObserveGC(f) {

[rmcilroy, 2016/05/12 09:31:18]

I'd just call this observeGC() and name the JS file observeGC.js.

Also, please add a comment explaining why what this does (i.e., returns a GC
observer for the object which is returned by function f) and why
internals.observeGC shouldn't be used directly.

Also a better name for 'f' would be good.

+  return internals.observeGC(f());
+}