Drag-and-drop: Move startDrag out of WebView/RenderView.

content/renderer/render_widget.cc

Index: content/renderer/render_widget.cc
diff --git a/content/renderer/render_widget.cc b/content/renderer/render_widget.cc
index 57bb2085f61e3f419307f96fb827956bc7ba7206..87d31becf56ef475be76a68714773e5cf13b95e4 100644
--- a/content/renderer/render_widget.cc
+++ b/content/renderer/render_widget.cc
@@ -27,6 +27,8 @@
 #include "cc/output/copy_output_request.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "content/common/content_switches_internal.h"
+#include "content/common/drag_event_source_info.h"
+#include "content/common/drag_messages.h"
 #include "content/common/input/synthetic_gesture_packet.h"
 #include "content/common/input_messages.h"
 #include "content/common/swapped_out_messages.h"
@@ -37,6 +39,7 @@
 #include "content/public/common/context_menu_params.h"
 #include "content/renderer/cursor_utils.h"
 #include "content/renderer/devtools/render_widget_screen_metrics_emulator.h"
+#include "content/renderer/drop_data_builder.h"
 #include "content/renderer/external_popup_menu.h"
 #include "content/renderer/gpu/frame_swap_message_queue.h"
 #include "content/renderer/gpu/queue_message_swap_promise.h"
@@ -103,10 +106,14 @@
 using blink::WebCompositionUnderline;
 using blink::WebCursorInfo;
 using blink::WebDeviceEmulationParams;
+using blink::WebDragOperationsMask;
+using blink::WebDragData;
 using blink::WebGestureEvent;
+using blink::WebImage;
 using blink::WebInputEvent;
 using blink::WebInputEventResult;
 using blink::WebKeyboardEvent;
+using blink::WebLocalFrame;
 using blink::WebMouseEvent;
 using blink::WebMouseWheelEvent;
 using blink::WebNavigationPolicy;
@@ -2090,6 +2097,21 @@ bool RenderWidget::isPointerLocked() {
       webwidget_mouse_lock_target_.get());
 }
 
+void RenderWidget::startDragging(WebLocalFrame* frame,
+                                 const WebDragData& data,
+                                 WebDragOperationsMask mask,
+                                 const WebImage& image,
+                                 const WebPoint& webImageOffset) {
+  blink::WebRect offset_in_window(webImageOffset.x, webImageOffset.y, 0, 0);
+  convertViewportToWindow(&offset_in_window);
+  DropData drop_data(DropDataBuilder::Build(data));
+  drop_data.referrer_policy = frame->document().referrerPolicy();
+  gfx::Vector2d imageOffset(offset_in_window.x, offset_in_window.y);
+  Send(new DragHostMsg_StartDragging(routing_id_, drop_data, mask,
+                                     image.getSkBitmap(), imageOffset,
+                                     possible_drag_event_info_));
+}
+
 blink::WebWidget* RenderWidget::GetWebWidget() const {
   return webwidget_internal_;
 }