Modify some gc related layout tests to work with Ignition.

third_party/WebKit/LayoutTests/fast/harness/internals-observe-gc.html

Index: third_party/WebKit/LayoutTests/fast/harness/internals-observe-gc.html
diff --git a/third_party/WebKit/LayoutTests/fast/harness/internals-observe-gc.html b/third_party/WebKit/LayoutTests/fast/harness/internals-observe-gc.html
index 4fb4c4eb373ad04bb2be8b3427e0458037141958..e2a257e09554ec79cb55462941050cb274135c30 100644
--- a/third_party/WebKit/LayoutTests/fast/harness/internals-observe-gc.html
+++ b/third_party/WebKit/LayoutTests/fast/harness/internals-observe-gc.html
@@ -9,12 +9,16 @@ shouldBe('typeof window.internals.observeGC', '"function"',
 
 // "Generic Kid's Movie III": ... where nobody dies.
 
-var valueA = {};
-// Do not pass the object directly to observeGC function. This may
-// remain live on this function's stack preventing GC from collecting
-// it. Accessing the object inside an inner function will prevent any
-// unneeded references on this function's stack.
-observationA = internals.observeGC((() => {return valueA;})());
+// Do initialization work in an inner function to avoid references to
+// objects remaining live on this function's stack frame.
+// (http://crbug.com/595672/).
+var valueA, observationA;
+function initializeA() {
+  valueA = {};
+  observationA = internals.observeGC(valueA);
+}
+
+initializeA();
 gc();
 shouldBeFalse('observationA.wasCollected');
 // value ineligible for GC should not be flagged as collected
@@ -23,13 +27,17 @@ observationA = null;
 
 // "Romeo and GCuliet": Romeo JavaScript finds G.uliet C.apulet and dies.
 
-var valueB = {};
-// Do not pass the object directly to observeGC function. This may
-// remain live on this function's stack preventing GC from collecting
-// it. Accessing the object inside an inner function will prevent any
-// unneeded references on this function's stack.
-observationB = internals.observeGC((() => {return valueB;})());
-valueB = null;
+// Do initialization work in an inner function to avoid references to
+// objects remaining live on this function's stack frame.
+// (http://crbug.com/595672/).
+var valueB, observationB;
+function initializeB() {
+  valueB = {};
+  observationB = internals.observeGC(valueB);
+  valueB = null;
+}
+
+initializeB();
 gc();
 shouldBeTrue('observationB.wasCollected');
 // value eligible for GC should be flagged as collected
@@ -38,13 +46,17 @@ observationB = null;
 // "One DOM Tree Hill": A family struggles with the loss of
 // innocence. And a DOM node.
 
-var valueC = document.createElement('div');
-// Do not pass the object directly to observeGC function. This may
-// remain live on this function's stack preventing GC from collecting
-// it. Accessing the object inside an inner function will prevent any
-// unneeded references on this function's stack.
-observationC = internals.observeGC((() => {return valueC;})());
-valueC = null;
+// Do initialization work in an inner function to avoid references to
+// objects remaining live on this function's stack frame.
+// (http://crbug.com/595672/).
+var valueC, observationC;
+function initializeC() {
+ valueC = document.createElement('div');
+ observationC = internals.observeGC(valueC);
+ valueC = null;
+}
+
+initializeC();
 gc();
 shouldBeTrue('observationC.wasCollected');
 // DOM node eligible for GC should be flagged as collected
@@ -59,15 +71,20 @@ shouldThrow('internals.observeGC(null)',
 
 // Try to create objects and observers that will die at once
 
-var valueD = {};
-// Do not pass the object directly to observeGC function. This may
-// remain live on this function's stack preventing GC from collecting
-// it. Accessing the object inside an inner function will prevent any
-// unneeded references on this function's stack.
-var observerD = internals.observeGC((() => {return valueD;})());
-valueD.observer = observerD;
-observerD.observed = valueD;
-valueD = observerD = null;
+// Do initialization work in an inner function to avoid references to
+// objects remaining live on this function's stack frame.
+// (http://crbug.com/595672/).
+var valueD;
+var observerD;
+function initializeD() {
+  valueD = {};
+  observerD = internals.observeGC(valueD);
+  valueD.observer = observerD;
+  observerD.observed = valueD;
+  valueD = observerD = null;
+}
+
+initializeD();
 gc();
 testPassed('did not crash');