Draggable region support for frameless app window on Windows.

content/browser/renderer_host/render_view_host_impl.cc

Index: content/browser/renderer_host/render_view_host_impl.cc
diff --git a/content/browser/renderer_host/render_view_host_impl.cc b/content/browser/renderer_host/render_view_host_impl.cc
index dcdbbaff5592fc738cefd2776dc08146dcb4624f..202a95f03d014470bc5d903c8d0b5011b1672e54 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -52,6 +52,7 @@
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/context_menu_params.h"
+#include "content/public/common/draggable_region.h"
 #include "content/public/common/result_codes.h"
 #include "content/public/common/url_constants.h"
 #include "net/base/net_util.h"
@@ -951,6 +952,8 @@ bool RenderViewHostImpl::OnMessageReceived(const IPC::Message& msg) {
                         OnDomOperationResponse)
     IPC_MESSAGE_HANDLER(AccessibilityHostMsg_Notifications,
                         OnAccessibilityNotifications)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateDraggableRegions,
+                        OnUpdateDraggableRegions)
     // Have the super handle all other messages.
     IPC_MESSAGE_UNHANDLED(
         handled = RenderWidgetHostImpl::OnMessageReceived(msg))
@@ -1877,6 +1880,11 @@ void RenderViewHostImpl::OnDomOperationResponse(
       content::Details<DomOperationNotificationDetails>(&details));
 }
 
+void RenderViewHostImpl::OnUpdateDraggableRegions(
+    const std::vector<content::DraggableRegion>& regions) {
+  delegate_->UpdateDraggableRegions(regions);
+}
+
 void RenderViewHostImpl::SetSwappedOut(bool is_swapped_out) {
   is_swapped_out_ = is_swapped_out;