Split Mac WebDropTarget into two, content and chrome.

chrome/browser/tab_contents/web_drag_bookmark_handler_mac.mm

+// 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_bookmark_handler_mac.h"
+
+#include "chrome/browser/ui/browser.h"
+#include "chrome/browser/ui/browser_window.h"
+#include "chrome/browser/ui/bookmarks/bookmark_tab_helper.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+
+WebDragBookmarkHandlerMac::WebDragBookmarkHandlerMac()
+    : tab_(NULL) {
+}
+
+WebDragBookmarkHandlerMac::~WebDragBookmarkHandlerMac() {}
+
+void WebDragBookmarkHandlerMac::DragInitialize(TabContents* contents) {

[jochen (gone - plz use gerrit), 2011/11/01 15:16:07]

maybe DCHECK that contents and tab are the same if tab_ != NULL?

[Avi (use Gerrit), 2011/11/01 16:01:06]

Done.

+  if (!tab_)
+    tab_ = TabContentsWrapper::GetCurrentWrapperForContents(contents);
+
+  bookmark_drag_data_.ReadFromDragClipboard();
+}
+
+void WebDragBookmarkHandlerMac::OnDragOver() {
+  if (tab_ && tab_->bookmark_tab_helper()->GetBookmarkDragDelegate())

[jochen (gone - plz use gerrit), 2011/11/01 15:16:07]

brackets since if-body >= 1 line

[Avi (use Gerrit), 2011/11/01 16:01:06]

will fix in source too

+    tab_->bookmark_tab_helper()->GetBookmarkDragDelegate()->OnDragOver(
+        bookmark_drag_data_);
+}
+
+void WebDragBookmarkHandlerMac::OnDragEnter() {
+  if (tab_ && tab_->bookmark_tab_helper()->GetBookmarkDragDelegate())

[jochen (gone - plz use gerrit), 2011/11/01 15:16:07]

same here

+    tab_->bookmark_tab_helper()->GetBookmarkDragDelegate()->OnDragEnter(
+        bookmark_drag_data_);
+}
+
+void WebDragBookmarkHandlerMac::OnDrop() {
+  // This is non-null if tab_contents_ is showing an ExtensionWebUI with
+  // support for (at the moment experimental) drag and drop extensions.
+  if (tab_) {
+    if (tab_->bookmark_tab_helper()->GetBookmarkDragDelegate()) {
+      tab_->bookmark_tab_helper()->GetBookmarkDragDelegate()->OnDrop(
+          bookmark_drag_data_);
+    }
+
+    // Focus the target browser.
+    Browser* browser = Browser::GetBrowserForController(
+        &tab_->controller(), NULL);
+    if (browser)
+      browser->window()->Show();
+  }
+}
+
+void WebDragBookmarkHandlerMac::OnDragLeave() {
+  if (tab_ && tab_->bookmark_tab_helper()->GetBookmarkDragDelegate())

[jochen (gone - plz use gerrit), 2011/11/01 15:16:07]

and here

+    tab_->bookmark_tab_helper()->GetBookmarkDragDelegate()->OnDragLeave(
+        bookmark_drag_data_);
+}