[UseZoomForDSF] Support drag&drop

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 4672bccd6fc703e014b5b2d022763a8adba569f0..b5293c7771b40714c826e1456138ef5f06780da8 100644
--- a/content/browser/renderer_host/render_view_host_impl.cc
+++ b/content/browser/renderer_host/render_view_host_impl.cc
@@ -692,9 +692,11 @@ void RenderViewHostImpl::DragTargetDragEnter(
                  .append(register_name));
   }
 
-  Send(new DragMsg_TargetDragEnter(GetRoutingID(), filtered_data, client_pt,
-                                   screen_pt, operations_allowed,
-                                   key_modifiers));
+  const gfx::Point client_pt_in_viewport = convertDipToViewport(client_pt);
+
+  Send(new DragMsg_TargetDragEnter(GetRoutingID(), filtered_data,
+                                   client_pt_in_viewport, screen_pt,
+                                   operations_allowed, key_modifiers));
 }
 
 void RenderViewHostImpl::DragTargetDragOver(
@@ -702,8 +704,10 @@ void RenderViewHostImpl::DragTargetDragOver(
     const gfx::Point& screen_pt,
     WebDragOperationsMask operations_allowed,
     int key_modifiers) {
-  Send(new DragMsg_TargetDragOver(GetRoutingID(), client_pt, screen_pt,
-                                  operations_allowed, key_modifiers));
+  const gfx::Point client_pt_in_viewport = convertDipToViewport(client_pt);
+  Send(new DragMsg_TargetDragOver(GetRoutingID(), client_pt_in_viewport,
+                                  screen_pt, operations_allowed,
+                                  key_modifiers));
 }
 
 void RenderViewHostImpl::DragTargetDragLeave() {
@@ -714,17 +718,18 @@ void RenderViewHostImpl::DragTargetDrop(
     const gfx::Point& client_pt,
     const gfx::Point& screen_pt,
     int key_modifiers) {
-  Send(new DragMsg_TargetDrop(GetRoutingID(), client_pt, screen_pt,
+  const gfx::Point client_pt_in_viewport = convertDipToViewport(client_pt);
+  Send(new DragMsg_TargetDrop(GetRoutingID(), client_pt_in_viewport, screen_pt,
                               key_modifiers));
 }
 
 void RenderViewHostImpl::DragSourceEndedAt(
     int client_x, int client_y, int screen_x, int screen_y,
     WebDragOperation operation) {
-  Send(new DragMsg_SourceEnded(GetRoutingID(),
-                               gfx::Point(client_x, client_y),
-                               gfx::Point(screen_x, screen_y),
-                               operation));
+  const gfx::Point client_pt_in_viewport =
+      convertDipToViewport(gfx::Point(client_x, client_y));
+  Send(new DragMsg_SourceEnded(GetRoutingID(), client_pt_in_viewport,
+                               gfx::Point(screen_x, screen_y), operation));
 }
 
 void RenderViewHostImpl::DragSourceSystemDragEnded() {
@@ -1393,4 +1398,9 @@ void RenderViewHostImpl::RenderViewReady() {
   delegate_->RenderViewReady(this);
 }
 
+gfx::Point RenderViewHostImpl::convertDipToViewport(const gfx::Point& point) {
+  float scale = GetWidget()->GetView()->current_device_scale_factor();
+  return gfx::Point(point.x() * scale, point.y() * scale);
+}
+
 }  // namespace content