DevTools: Make StepInto work across script boundaries and Blink process tasks.

LayoutTests/inspector/sources/debugger/resources/framework.js

Index: LayoutTests/inspector/sources/debugger/resources/framework.js
diff --git a/LayoutTests/inspector/sources/debugger/resources/framework.js b/LayoutTests/inspector/sources/debugger/resources/framework.js
index 6b6926f910bb4ab58168e304de80de96e588e664..efed1e775d4a717eabb177aa66947629c365db10 100644
--- a/LayoutTests/inspector/sources/debugger/resources/framework.js
+++ b/LayoutTests/inspector/sources/debugger/resources/framework.js
@@ -132,3 +132,15 @@ Framework.throwFrameworkExceptionAndCatch = function()
     } catch(e) {
     }
 }
+
+Framework.scheduleUntilDone = function(callback, delay)
+{
+    Framework.schedule(Framework_scheduleUntilDone, delay);
+
+    function Framework_scheduleUntilDone()
+    {
+        if (callback && callback())
+            return;
+        Framework.schedule(Framework_scheduleUntilDone, delay);
+    }
+}