Move HiDPI-related Pepper interfaces to stable

ppapi/api/ppb_graphics_2d.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.
  */
 
 /**
  * Defines the <code>PPB_Graphics2D</code> struct representing a 2D graphics
  * context within the browser.
  */
 
 label Chrome {
-  M14 = 1.0
+  M14 = 1.0,
+  M27 = 1.1
 };
 
 /**
  * <code>PPB_Graphics2D</code> defines the interface for a 2D graphics context.
  */
 [macro="PPB_GRAPHICS_2D_INTERFACE"]
 interface PPB_Graphics2D {
   /**
    * Create() creates a 2D graphics context. The returned graphics context will
    * not be bound to the module instance on creation (call BindGraphics() on
@@ skipping 212 matching lines @@
    * <code>PP_ERROR_BADRESOURCE</code> if the graphics context is invalid,
    * <code>PP_ERROR_BADARGUMENT</code> if the callback is null and flush is
    * being called from the main thread of the module, or
    * <code>PP_ERROR_INPROGRESS</code> if a flush is already pending that has
    * not issued its callback yet.  In the failure case, nothing will be updated
    * and no callback will be scheduled.
    */
   int32_t Flush(
       [in] PP_Resource graphics_2d,
       [in] PP_CompletionCallback callback);
+
+  /**
+   * SetScale() sets the scale factor that will be applied when painting the
+   * graphics context onto the output device. Typically, if rendering at device
+   * resolution is desired, the context would be created with the width and
+   * height scaled up by the view's GetDeviceScale and SetScale called with a
+   * scale of 1.0 / GetDeviceScale(). For example, if the view resource passed
+   * to DidChangeView has a rectangle of (w=200, h=100) and a device scale of
+   * 2.0, one would call Create with a size of (w=400, h=200) and then call
+   * SetScale with 0.5. One would then treat each pixel in the context as a
+   * single device pixel.
+   *
+   * @param[in] resource A <code>Graphics2D</code> context resource.
+   * @param[in] scale The scale to apply when painting.
+   *
+   * @return Returns <code>PP_TRUE</code> on success or <code>PP_FALSE</code> if
+   * the resource is invalid or the scale factor is 0 or less.
+   */
+  [version=1.1]
+  PP_Bool SetScale(
+      [in] PP_Resource resource,
+      [in] float_t scale);
+
+  /***
+   * GetScale() gets the scale factor that will be applied when painting the
+   * graphics context onto the output device.
+   *
+   * @param[in] resource A <code>Graphics2D</code> context resource.
+   *
+   * @return Returns the scale factor for the graphics context. If the resource
+   * is not a valid <code>Graphics2D</code> context, this will return 0.0.
+   */
+  [version=1.1]
+  float_t GetScale(
+      [in] PP_Resource resource);
+
 };