<webview> Implement clear http cache API.

extensions/browser/guest_view/web_view/web_view_constants.h

Index: extensions/browser/guest_view/web_view/web_view_constants.h
diff --git a/extensions/browser/guest_view/web_view/web_view_constants.h b/extensions/browser/guest_view/web_view/web_view_constants.h
index eaa2f0cf5957855084acb86e79109a6da8e44718..a15d7dde8646accf3cd1e2f302c247326f7c8d5f 100644
--- a/extensions/browser/guest_view/web_view/web_view_constants.h
+++ b/extensions/browser/guest_view/web_view/web_view_constants.h
@@ -7,6 +7,8 @@
 #ifndef EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_CONSTANTS_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_CONSTANTS_H_
 
+#include "base/basictypes.h"
+
 namespace webview {
 
 // Attributes.
@@ -122,6 +124,18 @@ extern const char kStoragePartitionId[];
 extern const unsigned int kMaxOutstandingPermissionRequests;
 extern const int kInvalidPermissionRequestID;
 
+// ClearData API constants.
+//
+// Note that these are not in an enum because using enums to declare bitmasks
+// results in the enum values being signed.
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_APPCACHE;
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_CACHE;
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_COOKIES;
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_FILE_SYSTEMS;
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_INDEXEDDB;
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_LOCAL_STORAGE;
+extern const uint32 WEB_VIEW_REMOVE_DATA_MASK_WEBSQL;
+
 }  // namespace webview
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_CONSTANTS_H_