Fixed drag and drop into and out of Browser Plugin.

content/browser/web_contents/web_drag_source_win.cc

Index: content/browser/web_contents/web_drag_source_win.cc
diff --git a/content/browser/web_contents/web_drag_source_win.cc b/content/browser/web_contents/web_drag_source_win.cc
index 18c18819da7ffdd4d85c4a5e9f853005dda425f5..a202395c6f64ae437d0d65e04881cb61cf1c3cde 100644
--- a/content/browser/web_contents/web_drag_source_win.cc
+++ b/content/browser/web_contents/web_drag_source_win.cc
@@ -35,7 +35,7 @@ WebDragSource::WebDragSource(gfx::NativeWindow source_wnd,
                              WebContents* web_contents)
     : ui::DragSourceWin(),
       source_wnd_(source_wnd),
-      render_view_host_(web_contents->GetRenderViewHost()),
+      web_contents_(web_contents),
       effect_(DROPEFFECT_NONE) {
   registrar_.Add(this, NOTIFICATION_WEB_CONTENTS_SWAPPED,
                  Source<WebContents>(web_contents));
@@ -55,15 +55,15 @@ void WebDragSource::OnDragSourceCancel() {
     return;
   }
 
-  if (!render_view_host_)
+  if (!web_contents_)
     return;
 
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceEndedAt(client.x(), client.y(),
-                                       screen.x(), screen.y(),
-                                       WebDragOperationNone);
+  web_contents_->DragSourceEndedAt(client.x(), client.y(),
+                                   screen.x(), screen.y(),
+                                   WebDragOperationNone);
 }
 
 void WebDragSource::OnDragSourceDrop() {
@@ -78,15 +78,14 @@ void WebDragSource::OnDragSourceDrop() {
 }
 
 void WebDragSource::DelayedOnDragSourceDrop() {
-  if (!render_view_host_)
+  if (!web_contents_)
     return;
 
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceEndedAt(
-      client.x(), client.y(), screen.x(), screen.y(),
-      WinDragOpToWebDragOp(effect_));
+  web_contents_->DragSourceEndedAt(client.x(), client.y(), screen.x(),
+                                   screen.y(), WinDragOpToWebDragOp(effect_));
 }
 
 void WebDragSource::OnDragSourceMove() {
@@ -98,14 +97,14 @@ void WebDragSource::OnDragSourceMove() {
     return;
   }
 
-  if (!render_view_host_)
+  if (!web_contents_)
     return;
 
   gfx::Point client;
   gfx::Point screen;
   GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceMovedTo(client.x(), client.y(),
-                                       screen.x(), screen.y());
+  web_contents_->DragSourceMovedTo(client.x(), client.y(),
+                                   screen.x(), screen.y());
 }
 
 void WebDragSource::Observe(int type,
@@ -115,12 +114,12 @@ void WebDragSource::Observe(int type,
     // When the WebContents get swapped, our render view host goes away.
     // That's OK, we can continue the drag, we just can't send messages back to
     // our drag source.
-    render_view_host_ = NULL;
+    web_contents_ = NULL;
   } else if (type == NOTIFICATION_WEB_CONTENTS_DISCONNECTED) {
     // This could be possible when we close the tab and the source is still
     // being used in DoDragDrop at the time that the virtual file is being
     // downloaded.
-    render_view_host_ = NULL;
+    web_contents_ = NULL;
   }
 }