Add comment to PPB_MouseInputEvent version 1.1 that GetMovement hasn't been supported.

ppapi/c/dev/ppb_input_event_dev.h

Index: ppapi/c/dev/ppb_input_event_dev.h
diff --git a/ppapi/c/dev/ppb_input_event_dev.h b/ppapi/c/dev/ppb_input_event_dev.h
new file mode 100644
index 0000000000000000000000000000000000000000..16a01004889c0fe8942149b20b66ef236a483041
--- /dev/null
+++ b/ppapi/c/dev/ppb_input_event_dev.h
@@ -0,0 +1,118 @@
+/* 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.
+ */
+
+#ifndef PPAPI_C_DEV_PPB_INPUT_EVENT_DEV_H_
+#define PPAPI_C_DEV_PPB_INPUT_EVENT_DEV_H_
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_point.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/pp_time.h"
+#include "ppapi/c/ppb_input_event.h"
+
+#define PPB_MOUSE_INPUT_EVENT_DEV_INTERFACE_1_1 "PPB_MouseInputEvent(Dev);1.1"
+#define PPB_MOUSE_INPUT_EVENT_DEV_INTERFACE \
+    PPB_MOUSE_INPUT_EVENT_DEV_INTERFACE_1_1
+
+/**
+ * The <code>PPB_MouseInputEvent</code> interface contains pointers to several
+ * functions related to mouse input events.
+ */
+struct PPB_MouseInputEvent_Dev {
+  /**
+   * Create() creates a mouse input event with the given parameters. Normally
+   * you will get a mouse event passed through the
+   * <code>HandleInputEvent</code> and will not need to create them, but some
+   * applications may want to create their own for internal use. The type must
+   * be one of the mouse event types.
+   *
+   * @param[in] instance The instance for which this event occurred.
+   *
+   * @param[in] type A <code>PP_InputEvent_Type</code> identifying the type of
+   * input event.
+   *
+   * @param[in] time_stamp A <code>PP_TimeTicks</code> indicating the time
+   * when the event occurred.
+   *
+   * @param[in] modifiers A bit field combination of the
+   * <code>PP_InputEvent_Modifier</code> flags.
+   *
+   * @param[in] mouse_button The button that changed for mouse down or up
+   * events. This value will be <code>PP_EVENT_MOUSEBUTTON_NONE</code> for
+   * mouse move, enter, and leave events.
+   *
+   * @param[in] mouse_position A <code>Point</code> containing the x and y
+   * position of the mouse when the event occurred.
+   *
+   * @param[in] mouse_movement The change in position of the mouse.
+   *
+   * @return A <code>PP_Resource</code> containing the new mouse input event.
+   */
+  PP_Resource (*Create)(PP_Instance instance,
+                        PP_InputEvent_Type type,
+                        PP_TimeTicks time_stamp,
+                        uint32_t modifiers,
+                        PP_InputEvent_MouseButton mouse_button,
+                        const struct PP_Point* mouse_position,
+                        int32_t click_count,
+                        const struct PP_Point* mouse_movement);
+  /**
+   * IsMouseInputEvent() determines if a resource is a mouse event.
+   *
+   * @param[in] resource A <code>PP_Resource</code> corresponding to an event.
+   *
+   * @return <code>PP_TRUE</code> if the given resource is a valid mouse input
+   * event, otherwise <code>PP_FALSE</code>.
+   */
+  PP_Bool (*IsMouseInputEvent)(PP_Resource resource);
+  /**
+   * GetButton() returns the mouse button that generated a mouse down or up
+   * event.
+   *
+   * @param[in] mouse_event A <code>PP_Resource</code> corresponding to a
+   * mouse event.
+   *
+   * @return The mouse button associated with mouse down and up events. This
+   * value will be <code>PP_EVENT_MOUSEBUTTON_NONE</code> for mouse move,
+   * enter, and leave events, and for all non-mouse events.
+   */
+  PP_InputEvent_MouseButton (*GetButton)(PP_Resource mouse_event);
+  /**
+   * GetPosition() returns the pixel location of a mouse input event. When
+   * the mouse is locked, it returns the last known mouse position just as
+   * mouse lock was entered.
+   *
+   * @param[in] mouse_event A <code>PP_Resource</code> corresponding to a
+   * mouse event.
+   *
+   * @return The point associated with the mouse event, relative to the upper-
+   * left of the instance receiving the event. These values can be negative for
+   * mouse drags. The return value will be (0, 0) for non-mouse events.
+   */
+  struct PP_Point (*GetPosition)(PP_Resource mouse_event);
+  /**
+   * TODO(brettw) figure out exactly what this means.
+   */
+  int32_t (*GetClickCount)(PP_Resource mouse_event);
+  /**
+   * Returns the change in position of the mouse. When the mouse is locked,
+   * although the mouse position doesn't actually change, this function
+   * still provides movement information, which indicates what the change in
+   * position would be had the mouse not been locked.
+   *
+   * @param[in] mouse_event A <code>PP_Resource</code> corresponding to a
+   * mouse event.
+   *
+   * @return The change in position of the mouse, relative to the previous
+   * position.
+   */
+  struct PP_Point (*GetMovement)(PP_Resource mouse_event);
+};
+
+#endif  /* PPAPI_C_DEV_PPB_INPUT_EVENT_DEV_H_ */
+