Random cleanup around google_apis/drive and c/b/drive.

chrome/browser/drive/drive_api_util.h

Index: chrome/browser/drive/drive_api_util.h
diff --git a/chrome/browser/drive/drive_api_util.h b/chrome/browser/drive/drive_api_util.h
index 90f8820eb5667739a0e9d1d746bf00913f26710c..69f30bbd40b7eeeb111603a9485877166350a8a2 100644
--- a/chrome/browser/drive/drive_api_util.h
+++ b/chrome/browser/drive/drive_api_util.h
@@ -19,11 +19,8 @@ class Value;
 }  // namespace base
 
 namespace google_apis {
-class AppList;
-class AppResource;
 class ChangeList;
 class ChangeResource;
-class DriveAppIcon;
 class FileList;
 class FileResource;
 class ResourceEntry;
@@ -66,17 +63,6 @@ std::string ExtractResourceIdFromUrl(const GURL& url);
 // into the new format.
 std::string CanonicalizeResourceId(const std::string& resource_id);
 
-// Note: Following constants and a function are used to support GetShareUrl on
-// Drive API v2. Unfortunately, there is no support on Drive API v2, so we need
-// to fall back to GData WAPI for the GetShareUrl. Thus, these are shared by
-// both GDataWapiService and DriveAPIService.
-// TODO(hidehiko): Remove these from here, when Drive API v2 supports
-// GetShareUrl.
-
-// OAuth2 scopes for the GData WAPI.
-extern const char kDocsListScope[];
-extern const char kDriveAppsScope[];
-
 // Converts FileResource to ResourceEntry.
 scoped_ptr<google_apis::ResourceEntry>
 ConvertFileResourceToResourceEntry(