[PPAPI] Fix a bunch of spelling mistakes

ppapi/api/dev/ppb_font_dev.idl

Index: ppapi/api/dev/ppb_font_dev.idl
diff --git a/ppapi/api/dev/ppb_font_dev.idl b/ppapi/api/dev/ppb_font_dev.idl
index 5d582d12493e27b32b7dd6e10f5390d15b736563..d2051a0be45c5d0330718496fb5f60d20243a87f 100644
--- a/ppapi/api/dev/ppb_font_dev.idl
+++ b/ppapi/api/dev/ppb_font_dev.idl
@@ -126,7 +126,7 @@ struct PP_TextRun_Dev {
    * When <code>override_direction</code> is false, the browser will perform
    * the Unicode Bidirectional Algorithm (http://unicode.org/reports/tr9/) on
    * the text. The value of the <code>rtl</code> flag specifies the
-   * direcionality of the surrounding environment. This means that Hebrew
+   * directionality of the surrounding environment. This means that Hebrew
    * word will always display right to left, even if <code>rtl</code> is false.
    *
    * When <code>override_direction</code> is true, no autodetection will be done
@@ -142,7 +142,7 @@ struct PP_TextRun_Dev {
    * content.
    *
    * If this flag is set, the browser will skip autodetection of the content
-   * and will display all text in the direction speficied by the
+   * and will display all text in the direction specified by the
    * <code>rtl</code> flag.
    */
   PP_Bool override_direction;
@@ -206,7 +206,7 @@ interface PPB_Font_Dev {
    * clipped to the image.
    *
    * The image_data_is_opaque flag indicates whether subpixel antialiasing can
-   * be performend, if it is supported. When the image below the text is
+   * be performed, if it is supported. When the image below the text is
    * opaque, subpixel antialiasing is supported and you should set this to
    * PP_TRUE to pick up the user's default preferences. If your plugin is
    * partially transparent, then subpixel antialiasing is not possible and