Remove legacy draggable region code and refactor to share common draggable region code

chrome/browser/ui/extensions/native_shell_window.cc

+// Copyright (c) 2012 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/ui/extensions/native_shell_window.h"
+
+#include "chrome/common/extensions/draggable_region.h"
+
+NativeShellWindow::NativeShellWindow(const ShellWindow::CreateParams& params)
+    : frameless_(params.frame == ShellWindow::CreateParams::FRAME_NONE) {
+}
+
+NativeShellWindow::~NativeShellWindow() {
+}
+
+void NativeShellWindow::UpdateDraggableRegions(
+    const std::vector<extensions::DraggableRegion>& regions) {
+  // Draggable region is not supported for non-frameless window.
+  if (!frameless_)
+    return;
+
+  draggable_regions_.reset(new SkRegion);
+  for (std::vector<extensions::DraggableRegion>::const_iterator iter =
+           regions.begin();
+       iter != regions.end(); ++iter) {
+    const extensions::DraggableRegion& region = *iter;
+    draggable_regions_->op(
+        region.bounds.x(),
+        region.bounds.y(),
+        region.bounds.right(),
+        region.bounds.bottom(),
+        region.draggable ? SkRegion::kUnion_Op : SkRegion::kDifference_Op);
+  }
+}
+
+bool NativeShellWindow::IsInsideDraggableRegions(int x, int y) const {
+  return frameless_ && draggable_regions_ && draggable_regions_->contains(x, y);
+}