Shows chrome-extension urls and greys out the whole url.

chrome/browser/ui/toolbar/toolbar_model.h

Index: chrome/browser/ui/toolbar/toolbar_model.h
diff --git a/chrome/browser/ui/toolbar/toolbar_model.h b/chrome/browser/ui/toolbar/toolbar_model.h
index c9aead57fff741cfa46fb07dc355dc6b48afb5a5..8435ea0f7901f608e9e358e5cdcb40626d23a7e9 100644
--- a/chrome/browser/ui/toolbar/toolbar_model.h
+++ b/chrome/browser/ui/toolbar/toolbar_model.h
@@ -70,6 +70,10 @@ class ToolbarModel {
   // in the location bar.
   virtual bool ShouldDisplayURL() const = 0;
 
+  // Returns true when the URL host for the current navigation entry should
+  // NOT be emphasized in the location bar.

[Devlin, 2013/03/27 15:59:52]

You should emphasize that this is just a handle to return the value from its
parent WebContents' WebUI, as opposed to something determined by its own data
(in addition to changing the name).

[Patrick Riordan, 2013/03/27 19:43:28]

Done.

+  virtual bool ShouldNotEmphasizeHost() const = 0;
+
   // Getter/setter of whether the text in location bar is currently being
   // edited.
   virtual void SetInputInProgress(bool value) = 0;