Remove unused PPB_View_Dev

ppapi/api/dev/ppb_view_dev.idl

-/* 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.
- */
-
-/* This file contains the <code>PPB_View_Dev</code> interface. */
-
-[generate_thunk]
-
-label Chrome {
-  M22 = 0.1
-};
-
-/* PPB_View_Dev interface */
-interface PPB_View_Dev {
-  /**
-   * GetDeviceScale returns the scale factor between device pixels and DIPs
-   * (also known as logical pixels or UI pixels on some platforms). This allows
-   * the developer to render their contents at device resolution, even as
-   * coordinates / sizes are given in DIPs through the API.
-   *
-   * Note that the coordinate system for Pepper APIs is DIPs. Also note that
-   * one DIP might not equal one CSS pixel - when page scale/zoom is in effect.
-   *
-   * @param[in] resource A <code>PP_Resource</code> corresponding to a
-   * <code>PPB_View</code> resource.
-   *
-   * @return A <code>float</code> value representing the number of device pixels
-   * per DIP. If the resource is invalid, the value will be 0.0.
-   */
-  float_t GetDeviceScale([in] PP_Resource resource);
-
-  /**
-   * GetCSSScale returns the scale factor between DIPs and CSS pixels. This
-   * allows proper scaling between DIPs - as sent via the Pepper API - and CSS
-   * pixel coordinates used for Web content.
-   *
-   * @param[in] resource A <code>PP_Resource</code> corresponding to a
-   * <code>PPB_View</code> resource.
-   *
-   * @return css_scale A <code>float</code> value representing the number of
-   * DIPs per CSS pixel. If the resource is invalid, the value will be 0.0.
-   */
-  float_t GetCSSScale([in] PP_Resource resource);
-};
-