Disable off-store extension installs by default.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 928b96e76e0091f4ee1e5db87779882705f0946c..a8f95d0ad02a52cf878418c69fefa77cc26ef4a4 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -168,12 +168,6 @@ class ExtensionService
   // settings are stored.
   static const char* kSyncExtensionSettingsDirectoryName;
 
-  // Determine if a given extension download should be treated as if it came
-  // from the gallery. Note that this is requires *both* that the download_url
-  // match and that the download was referred from a gallery page.
-  bool IsDownloadFromGallery(const GURL& download_url,
-                             const GURL& referrer_url);
-
   // Returns the Extension of hosted or packaged apps, NULL otherwise.
   const Extension* GetInstalledApp(const GURL& url);
 
@@ -373,9 +367,6 @@ class ExtensionService
   // an existing extension.
   virtual void SyncExtensionChangeIfNeeded(const Extension& extension) OVERRIDE;
 
-  // The App that represents the web store.
-  const Extension* GetWebStoreApp();
-
   // Returns true if |url| should get extension api bindings and be permitted
   // to make api calls. Note that this is independent of what extension
   // permissions the given extension has been granted.