Support setting mouse cursor icon in Android N.

ui/base/cursor/cursors_android.cc

+// Copyright 2017 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 "ui/base/cursor/cursors_android.h"
+
+#include "content/app/resources/grit/content_resources.h"
+#include "third_party/WebKit/public/platform/WebCursorInfo.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
+
+using blink::WebCursorInfo;
+
+namespace ui {
+
+bool GetCursorBitmap(int type, SkBitmap* bitmap) {
+  DCHECK(bitmap);
+  int resource_id;
+  switch (type) {
+    case WebCursorInfo::kTypeEastResize:
+      resource_id = IDR_ANDROID_EAST_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeNorthResize:
+      resource_id = IDR_ANDROID_NORTH_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeNorthEastResize:
+      resource_id = IDR_ANDROID_NORTHEAST_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeNorthWestResize:
+      resource_id = IDR_ANDROID_NORTHWEST_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeSouthResize:
+      resource_id = IDR_ANDROID_SOUTH_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeSouthEastResize:
+      resource_id = IDR_ANDROID_SOUTHEAST_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeSouthWestResize:
+      resource_id = IDR_ANDROID_SOUTHWEST_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeWestResize:
+      resource_id = IDR_ANDROID_WEST_RESIZE_CURSOR;
+      break;
+    case WebCursorInfo::kTypeMove:
+      resource_id = IDR_ANDROID_MOVE_CURSOR;
+      break;
+    // TODO(jaebaek): set PROGRESS, MIDDLE_PANNING and NOT_ALLOWED
+    // types correctly after fixing http://crbug.com/584424.
+    case WebCursorInfo::kTypeMiddlePanning:
+    case WebCursorInfo::kTypeProgress:
+    case WebCursorInfo::kTypeNotAllowed:
+    default:
+      return false;
+  }
+
+  const SkBitmap* cursor_bitmap = ResourceBundle::GetSharedInstance()
+                                      .GetImageSkiaNamed(resource_id)

[aelias_OOO_until_Jul13, 2017/05/23 22:43:26]

Hmm, sorry to go back on previous code review suggestion, but I changed my mind
about how best to add our own custom cursors.  This also will mdpi, xhdpi and
accessibility-large cursors, as well as anchor points, based on what the Android
cursors have.  This will be hard to do using the C++ custom-cursor path -- it
should probably be done as Android resources instead.  But as we don't have
proper PNGs for all of these formats yet, we should just leave them all to the
default cursor in this patch.

[jaebaek, 2017/05/24 11:26:15]

Can I just return false for all the cases here and comment TODO?
Or do you mean that I remove all this code (i.e., this file)?

+                                      ->bitmap();
+  if (!cursor_bitmap)
+    return false;
+  *bitmap = *cursor_bitmap;
+  return true;
+}
+
+}  // namespace ui