Remove some dead code for permission bubbles.

chrome/browser/ui/website_settings/permission_bubble_request.h

Index: chrome/browser/ui/website_settings/permission_bubble_request.h
diff --git a/chrome/browser/ui/website_settings/permission_bubble_request.h b/chrome/browser/ui/website_settings/permission_bubble_request.h
index 50692c855115b70259f0aa61b53ec02796326b90..1062e6c2b62d18d255361224bac07a2d156e5d13 100644
--- a/chrome/browser/ui/website_settings/permission_bubble_request.h
+++ b/chrome/browser/ui/website_settings/permission_bubble_request.h
@@ -51,11 +51,6 @@ class PermissionBubbleRequest {
   // Must be a valid icon of size 18x18.
   virtual int GetIconId() const = 0;
 
-  // Returns the full prompt text for this permission. This is the only text
-  // that will be shown in the single-permission case and should be phrased
-  // positively as a complete sentence.
-  virtual base::string16 GetMessageText() const = 0;
-
   // Returns the shortened prompt text for this permission.  Must be phrased
   // as a heading, e.g. "Location", or "Camera". The permission bubble may
   // coalesce different requests, and if it does, this text will be displayed