Modify WebView drop effect override values.

Used for gears file drag & drop in chrome, define the values of
the drop effect overrides to match the gears definitions.

BUG=7995

Original patch by Noel Gordon via:
http://codereview.chromium.org/99231

Review URL: http://codereview.chromium.org/102016


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@14971 0039d316-1c4b-4281-b951-d872f2087c98

webkit/glue/webview_impl.h

@@ -331,11 +331,11 @@ class WebViewImpl : public WebView, public base::RefCounted<WebViewImpl> {
   int32 drag_identity_;
 
   // Valid when drag_target_dispatch_ is true.  Used to override the default
-  // browser drop effect with the effects "copy" or "none".
+  // browser drop effect with the effects "none" or "copy".
   enum DragTargetDropEffect {
-    DROP_EFFECT_DEFAULT = 0,
-    DROP_EFFECT_COPY,
-    DROP_EFFECT_NONE
+    DROP_EFFECT_DEFAULT = -1,
+    DROP_EFFECT_NONE,
+    DROP_EFFECT_COPY
   } drop_effect_;
 
   // When true, the drag data can be dropped onto the current drop target in