Draggable region support for frameless app window on Windows.

chrome/common/extensions/extension_messages.h

Index: chrome/common/extensions/extension_messages.h
diff --git a/chrome/common/extensions/extension_messages.h b/chrome/common/extensions/extension_messages.h
index a7fd594cc654f2da8cbd220b5aafe650a11b925d..7cd58e3ef942e43bc15778d4c7f58625ba8a1507 100644
--- a/chrome/common/extensions/extension_messages.h
+++ b/chrome/common/extensions/extension_messages.h
@@ -7,6 +7,7 @@
 
 #include "base/shared_memory.h"
 #include "base/values.h"
+#include "chrome/common/extensions/draggable_region.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/permissions/permission_set.h"
 #include "chrome/common/extensions/url_pattern.h"
@@ -95,6 +96,12 @@ IPC_STRUCT_TRAITS_BEGIN(WebApplicationInfo)
   IPC_STRUCT_TRAITS_MEMBER(is_offline_enabled)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(extensions::DraggableRegion)
+  IPC_STRUCT_TRAITS_MEMBER(label)
+  IPC_STRUCT_TRAITS_MEMBER(bounds)
+  IPC_STRUCT_TRAITS_MEMBER(clip)
+IPC_STRUCT_TRAITS_END()
+
 // Singly-included section for custom IPC traits.
 #ifndef CHROME_COMMON_EXTENSIONS_EXTENSION_MESSAGES_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_MESSAGES_H_
@@ -503,3 +510,7 @@ IPC_SYNC_MESSAGE_CONTROL0_1(ExtensionHostMsg_GenerateUniqueID,
 
 // Resumes resource requests for a newly created app window.
 IPC_MESSAGE_CONTROL1(ExtensionHostMsg_ResumeRequests, int /* route_id */)
+
+// Sent by the renderer when the draggable regions are updated.
+IPC_MESSAGE_ROUTED1(ExtensionHostMsg_UpdateDraggableRegions,
+                    std::vector<extensions::DraggableRegion> /* regions */)