add mole collapse/expand events. convert mappy to use this.

chrome/renderer/extensions/extension_process_bindings.cc

Index: chrome/renderer/extensions/extension_process_bindings.cc
diff --git a/chrome/renderer/extensions/extension_process_bindings.cc b/chrome/renderer/extensions/extension_process_bindings.cc
index 8aaa2f216293d7094ddaaa756a36e1418ff4a73a..7a9d0ac0ae0c2c98787e5bbce3a1ba9e1f8a230c 100644
--- a/chrome/renderer/extensions/extension_process_bindings.cc
+++ b/chrome/renderer/extensions/extension_process_bindings.cc
@@ -106,6 +106,8 @@ class ExtensionImpl : public ExtensionBase {
       return v8::FunctionTemplate::New(GetCurrentPageActions);
     } else if (name->Equals(v8::String::New("StartRequest"))) {
       return v8::FunctionTemplate::New(StartRequest);
+    } else if (name->Equals(v8::String::New("GetRenderViewId"))) {
+      return v8::FunctionTemplate::New(GetRenderViewId);
     }
 
     return ExtensionBase::GetNativeFunction(name);
@@ -268,6 +270,13 @@ class ExtensionImpl : public ExtensionBase {
 
     return v8::Undefined();
   }
+
+  static v8::Handle<v8::Value> GetRenderViewId(const v8::Arguments& args) {
+    RenderView* renderview = bindings_utils::GetRenderViewForCurrentContext();
+    if (!renderview)
+      return v8::Undefined();
+    return v8::Integer::New(renderview->routing_id());
+  }
 };
 
 }  // namespace