Add a DevTools command to create an isolated world for a given frame

third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.h

Index: third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.h
diff --git a/third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.h b/third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.h
index a8cff87dc798b3ec1f43831f7f32448ffc6a5d39..fc2bd7b308be6da73a29ba92f9273d4c32a3dbad 100644
--- a/third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.h
+++ b/third_party/WebKit/Source/platform/bindings/DOMWrapperWorld.h
@@ -59,6 +59,8 @@ class PLATFORM_EXPORT DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
     // Embedder isolated worlds can use IDs in [1, 1<<29).
     kEmbedderWorldIdLimit = (1 << 29),
     kDocumentXMLTreeViewerWorldId,
+    kDevToolsFirstIsolatedWorldId,
+    kDevToolsLastIsolatedWorldId = kDevToolsFirstIsolatedWorldId + 10,

[pfeldman, 2017/05/05 15:40:24]

10 worlds should be enough for everyone? :) Can we bump it to a 100?

[caseq, 2017/05/05 16:36:02]

+1, I can imagine an easy scenario for leaking these ids when client repeatedly
re-connects, considering we can't release worlds.

[alex clarke (OOO till 29th), 2017/05/05 19:29:44]

Done.

[alex clarke (OOO till 29th), 2017/05/05 19:29:44]

Done.

     kIsolatedWorldIdLimit,
 
     // Other worlds can use IDs after this. Don't manually pick up an ID from
@@ -141,6 +143,11 @@ class PLATFORM_EXPORT DOMWrapperWorld : public RefCounted<DOMWrapperWorld> {
         DOMObjectHolder<T>::Create(isolate, object, wrapper));
   }
 
+  // Returns an id in the range
+  // [kDevToolsFirstIsolatedWorldId, kDevToolsLastIsolatedWorldId] or
+  // kInvalidWorldId if that range has been exhausted.
+  static int GetNextDevToolsIsolatedWorldId();
+
  private:
   class DOMObjectHolderBase {
     USING_FAST_MALLOC(DOMObjectHolderBase);