Move the core drag&drop code for Windows to content\browser to match Mac/GTK. I've had to add tempo…

chrome/browser/tab_contents/web_drag_source_win.cc

Index: chrome/browser/tab_contents/web_drag_source_win.cc
===================================================================
--- chrome/browser/tab_contents/web_drag_source_win.cc	(revision 124553)
+++ chrome/browser/tab_contents/web_drag_source_win.cc	(working copy)
@@ -1,126 +0,0 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/tab_contents/web_drag_source_win.h"
-
-#include "base/bind.h"
-#include "chrome/browser/tab_contents/web_drag_utils_win.h"
-#include "content/browser/renderer_host/render_view_host.h"
-#include "content/public/browser/browser_thread.h"
-#include "content/public/browser/notification_source.h"
-#include "content/public/browser/notification_types.h"
-#include "content/public/browser/web_contents.h"
-
-using WebKit::WebDragOperationNone;
-using content::BrowserThread;
-using content::WebContents;
-
-namespace {
-
-static void GetCursorPositions(gfx::NativeWindow wnd, gfx::Point* client,
-                               gfx::Point* screen) {
-  POINT cursor_pos;
-  GetCursorPos(&cursor_pos);
-  screen->SetPoint(cursor_pos.x, cursor_pos.y);
-  ScreenToClient(wnd, &cursor_pos);
-  client->SetPoint(cursor_pos.x, cursor_pos.y);
-}
-
-}  // namespace
-
-///////////////////////////////////////////////////////////////////////////////
-// WebDragSource, public:
-
-WebDragSource::WebDragSource(gfx::NativeWindow source_wnd,
-                             WebContents* web_contents)
-    : ui::DragSource(),
-      source_wnd_(source_wnd),
-      render_view_host_(web_contents->GetRenderViewHost()),
-      effect_(DROPEFFECT_NONE) {
-  registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_SWAPPED,
-                 content::Source<WebContents>(web_contents));
-  registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
-                 content::Source<WebContents>(web_contents));
-}
-
-WebDragSource::~WebDragSource() {
-}
-
-void WebDragSource::OnDragSourceCancel() {
-  // Delegate to the UI thread if we do drag-and-drop in the background thread.
-  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-    BrowserThread::PostTask(
-        BrowserThread::UI, FROM_HERE,
-        base::Bind(&WebDragSource::OnDragSourceCancel, this));
-    return;
-  }
-
-  if (!render_view_host_)
-    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);
-}
-
-void WebDragSource::OnDragSourceDrop() {
-  // On Windows, we check for drag end in IDropSource::QueryContinueDrag which
-  // happens before IDropTarget::Drop is called. HTML5 requires the "dragend"
-  // event to happen after the "drop" event. Since  Windows calls these two
-  // directly after each other we can just post a task to handle the
-  // OnDragSourceDrop after the current task.
-  BrowserThread::PostTask(
-      BrowserThread::UI, FROM_HERE,
-      base::Bind(&WebDragSource::DelayedOnDragSourceDrop, this));
-}
-
-void WebDragSource::DelayedOnDragSourceDrop() {
-  if (!render_view_host_)
-    return;
-
-  gfx::Point client;
-  gfx::Point screen;
-  GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceEndedAt(
-      client.x(), client.y(), screen.x(), screen.y(),
-      web_drag_utils_win::WinDragOpToWebDragOp(effect_));
-}
-
-void WebDragSource::OnDragSourceMove() {
-  // Delegate to the UI thread if we do drag-and-drop in the background thread.
-  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
-    BrowserThread::PostTask(
-        BrowserThread::UI, FROM_HERE,
-        base::Bind(&WebDragSource::OnDragSourceMove, this));
-    return;
-  }
-
-  if (!render_view_host_)
-    return;
-
-  gfx::Point client;
-  gfx::Point screen;
-  GetCursorPositions(source_wnd_, &client, &screen);
-  render_view_host_->DragSourceMovedTo(client.x(), client.y(),
-                                       screen.x(), screen.y());
-}
-
-void WebDragSource::Observe(int type,
-    const content::NotificationSource& source,
-    const content::NotificationDetails& details) {
-  if (content::NOTIFICATION_WEB_CONTENTS_SWAPPED == type) {
-    // When the tab contents 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;
-  } else if (content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED == type) {
-    // 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;
-  }
-}