Delete code for and references to mini-gallery and theme install bubbles.

chrome/common/extensions/extension_constants.h

Index: chrome/common/extensions/extension_constants.h
diff --git a/chrome/common/extensions/extension_constants.h b/chrome/common/extensions/extension_constants.h
index 804fb0e7e6cdd112bd9e49383fc9795ffbb58843..737c7b21b098a488690be4e27d408ffbbcc71085 100644
--- a/chrome/common/extensions/extension_constants.h
+++ b/chrome/common/extensions/extension_constants.h
@@ -306,11 +306,6 @@ namespace extension_urls {
   // The greatest common prefixes of the main extensions gallery's browse and
   // download URLs.
   extern const char* kGalleryBrowsePrefix;
-
-  // Same thing for the "minigallery". The minigallery is the temporary static
-  // themes gallery that we put up when we launched themes.
-  extern const char* kMiniGalleryBrowsePrefix;
-  extern const char* kMiniGalleryDownloadPrefix;
 }  // namespace extension_urls
 
 namespace extension_filenames {