Convert a few ppapi dev interfaces to IDL. NaCl has tests for these

ppapi/c/dev/ppb_cursor_control_dev.h

Index: ppapi/c/dev/ppb_cursor_control_dev.h
diff --git a/ppapi/c/dev/ppb_cursor_control_dev.h b/ppapi/c/dev/ppb_cursor_control_dev.h
index e401ef14c916fb7804637a9457153b2799a29611..4bb3b8098bf94442d4ed46fbf9f0575305f037c4 100644
--- a/ppapi/c/dev/ppb_cursor_control_dev.h
+++ b/ppapi/c/dev/ppb_cursor_control_dev.h
@@ -2,57 +2,82 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
+/* From dev/ppb_cursor_control_dev.idl modified Thu Nov 17 14:24:28 2011. */
+
 #ifndef PPAPI_C_DEV_PPB_CURSOR_CONTROL_DEV_H_
 #define PPAPI_C_DEV_PPB_CURSOR_CONTROL_DEV_H_
 
-#include "ppapi/c/pp_bool.h"
 #include "ppapi/c/dev/pp_cursor_type_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"
 
 #define PPB_CURSOR_CONTROL_DEV_INTERFACE_0_4 "PPB_CursorControl(Dev);0.4"
 #define PPB_CURSOR_CONTROL_DEV_INTERFACE PPB_CURSOR_CONTROL_DEV_INTERFACE_0_4
 
+/**
+ * @file
+ * This file defines the <code>PPB_CursorControl_Dev</code> interface
+ * implemented by the browser for controlling the cursor.
+ */
+
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
 struct PPB_CursorControl_Dev {
-  // Set a cursor.  If "type" is PP_CURSORTYPE_CUSTOM, then "custom_image"
-  // must be an ImageData resource containing the cursor and "hot_spot" must
-  // contain the offset within that image that refers to the cursor's position.
+  /**
+   * Set a cursor.  If "type" is PP_CURSORTYPE_CUSTOM, then "custom_image"
+   * must be an ImageData resource containing the cursor and "hot_spot" must
+   * contain the offset within that image that refers to the cursor's position.
+   */
   PP_Bool (*SetCursor)(PP_Instance instance,
                        enum PP_CursorType_Dev type,
                        PP_Resource custom_image,
                        const struct PP_Point* hot_spot);
-
-  // This method causes the cursor to be moved to the center of the
-  // instance and be locked, preventing the user from moving it.
-  // The cursor is implicitly hidden from the user while locked.
-  // Cursor lock may only be requested in response to a
-  // PP_InputEvent_MouseDown, and then only if the event was generated via
-  // user gesture.
-  //
-  // While the cursor is locked, any movement of the mouse will
-  // generate a PP_InputEvent_Type_MouseMove, whose x and y values
-  // indicate the position the cursor would have been moved to had
-  // the cursor not been locked, and had the screen been infinite in size.
-  //
-  // The browser may revoke cursor lock for reasons including but not
-  // limited to the user pressing the ESC key, the user activating
-  // another program via a reserved keystroke (e.g., ALT+TAB), or
-  // some other system event.
-  //
-  // Returns PP_TRUE if the cursor could be locked, PP_FALSE otherwise.
-  PP_Bool (*LockCursor)(PP_Instance);
-
-  // Causes the cursor to be unlocked, allowing it to track user
-  // movement again.
-  PP_Bool (*UnlockCursor)(PP_Instance);
-
-  // Returns PP_TRUE if the cursor is locked, PP_FALSE otherwise.
-  PP_Bool (*HasCursorLock)(PP_Instance);
-
-  // Returns PP_TRUE if the cursor can be locked, PP_FALSE otherwise.
-  PP_Bool (*CanLockCursor)(PP_Instance);
+  /**
+   * This method causes the cursor to be moved to the center of the
+   * instance and be locked, preventing the user from moving it.
+   * The cursor is implicitly hidden from the user while locked.
+   * Cursor lock may only be requested in response to a
+   * PP_InputEvent_MouseDown, and then only if the event was generated via
+   * user gesture.
+   *
+   * While the cursor is locked, any movement of the mouse will
+   * generate a PP_InputEvent_Type_MouseMove, whose x and y values
+   * indicate the position the cursor would have been moved to had
+   * the cursor not been locked, and had the screen been infinite in size.
+   *
+   * The browser may revoke cursor lock for reasons including but not
+   * limited to the user pressing the ESC key, the user activating
+   * another program via a reserved keystroke (e.g., ALT+TAB), or
+   * some other system event.
+   *
+   * Returns PP_TRUE if the cursor could be locked, PP_FALSE otherwise.
+   */
+  PP_Bool (*LockCursor)(PP_Instance instance);
+  /**
+   * Causes the cursor to be unlocked, allowing it to track user
+   * movement again.
+   */
+  PP_Bool (*UnlockCursor)(PP_Instance instance);
+  /**
+   * Returns PP_TRUE if the cursor is locked, PP_FALSE otherwise.
+   */
+  PP_Bool (*HasCursorLock)(PP_Instance instance);
+  /**
+   * Returns PP_TRUE if the cursor can be locked, PP_FALSE otherwise.
+   */
+  PP_Bool (*CanLockCursor)(PP_Instance instance);
 };
+/**
+ * @}
+ */
 
 #endif  /* PPAPI_C_DEV_PPB_CURSOR_CONTROL_DEV_H_ */