Disable zoom bubble for PDF extension.

chrome/browser/extensions/extension_util.h

Index: chrome/browser/extensions/extension_util.h
diff --git a/chrome/browser/extensions/extension_util.h b/chrome/browser/extensions/extension_util.h
index a1197ae8e8024c1988330c1798d312bd2b203311..aa8f613d3ecc98891623d21bf27c8d4c3df09315 100644
--- a/chrome/browser/extensions/extension_util.h
+++ b/chrome/browser/extensions/extension_util.h
@@ -52,9 +52,6 @@ bool CanCrossIncognito(const extensions::Extension* extension,
 bool CanLoadInIncognito(const extensions::Extension* extension,
                         content::BrowserContext* context);
 
-// Returns true if the |extension| should not trigger a zoom bubble.
-bool AllowZoomWithoutBubble(const Extension* extension);
-
 // Returns true if this extension can inject scripts into pages with file URLs.
 bool AllowFileAccess(const std::string& extension_id,
                      content::BrowserContext* context);