delete previous word keybindings (bug #57967)

content/xbl/builtin/mac/platformHTMLBindings.xml

@@ -25,6 +25,7 @@
       <handler event="keypress" keycode="VK_RIGHT" modifiers="accel" command="cmd_endLine"/>
       <handler event="keypress" keycode="VK_LEFT"  modifiers="accel,shift" command="cmd_selectBeginLine"/>
       <handler event="keypress" keycode="VK_RIGHT" modifiers="accel,shift" command="cmd_selectEndLine"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="alt" command="cmd_deleteWordBackward"/>
     </handlers>
   </binding>
 
@@ -53,6 +54,7 @@
       <handler event="keypress" keycode="VK_RIGHT" modifiers="accel" command="cmd_endLine"/>
       <handler event="keypress" keycode="VK_LEFT"  modifiers="accel,shift" command="cmd_selectBeginLine"/>
       <handler event="keypress" keycode="VK_RIGHT" modifiers="accel,shift" command="cmd_selectEndLine"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="alt" command="cmd_deleteWordBackward"/>
     </handlers>
   </binding>
 
@@ -100,6 +102,7 @@
       <handler event="keypress" keycode="VK_DOWN" modifiers="accel" command="cmd_moveBottom"/>
       <handler event="keypress" keycode="VK_UP"   modifiers="accel,shift" command="cmd_selectTop"/>
       <handler event="keypress" keycode="VK_DOWN" modifiers="accel,shift" command="cmd_selectBottom"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="alt" command="cmd_deleteWordBackward"/>
     </handlers>
   </binding>
 

content/xbl/builtin/unix/platformHTMLBindings.xml

@@ -53,6 +53,8 @@
         command="cmd_selectBeginLine"/>
     <handler event="keypress" keycode="VK_END" modifiers="control,shift"
         command="cmd_selectEndLine"/>
+    <handler event="keypress" keycode="VK_BACK" modifiers="control"
+        command="cmd_deleteWordBackward"/>
 
     <handler event="keypress" keycode="VK_LEFT" modifiers="control" 
         command="cmd_wordPrevious"/>
@@ -142,6 +144,8 @@
         command="cmd_selectWordPrevious"/>
     <handler event="keypress" keycode="VK_RIGHT" modifiers="shift,control" 
         command="cmd_selectWordNext"/>
+    <handler event="keypress" keycode="VK_BACK" modifiers="control"
+        command="cmd_deleteWordBackward"/>
     <handler event="keypress" key="y" modifiers="accel"
         command="cmd_redo"/>
     <handler event="keypress" key="r" modifiers="accel"
@@ -203,6 +207,7 @@
       <handler event="keypress" keycode="VK_RIGHT" modifiers="control" command="cmd_wordNext"/>
       <handler event="keypress" keycode="VK_LEFT" modifiers="shift,control" command="cmd_selectWordPrevious"/>
       <handler event="keypress" keycode="VK_RIGHT" modifiers="shift,control" command="cmd_selectWordNext"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="control" command="cmd_deleteWordBackward"/>
       <handler event="keypress" keycode="VK_HOME" command="cmd_beginLine"/>
       <handler event="keypress" keycode="VK_END" command="cmd_endLine"/>
       <handler event="keypress" keycode="VK_HOME" modifiers="shift" command="cmd_selectBeginLine"/>

content/xbl/builtin/win/platformHTMLBindings.xml

@@ -43,6 +43,8 @@
         command="cmd_paste"/>
       <handler event="keypress" keycode="VK_BACK" modifiers="alt"
         command="cmd_undo"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="control"
+        command="cmd_deleteWordBackward"/>
     </handlers>
   </binding>
 
@@ -76,6 +78,8 @@
       <handler event="keypress" keycode="VK_INSERT" modifiers="control" command="cmd_copy"/>
       <handler event="keypress" keycode="VK_INSERT" modifiers="shift" command="cmd_paste"/>
       <handler event="keypress" keycode="VK_BACK" modifiers="alt" command="cmd_undo"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="control"
+        command="cmd_deleteWordBackward"/>
      </handlers>
   </binding>
 
@@ -115,6 +119,8 @@
       <handler event="keypress" keycode="VK_END" modifiers="shift,control" command="cmd_selectBottom"/>
       <handler event="keypress" keycode="VK_HOME" modifiers="control" command="cmd_moveTop"/>
       <handler event="keypress" keycode="VK_END" modifiers="control" command="cmd_moveBottom"/>
+      <handler event="keypress" keycode="VK_BACK" modifiers="control"
+        command="cmd_deleteWordBackward"/>
 
       <handler event="keypress" keycode="VK_HOME" command="cmd_beginLine"/>
       <handler event="keypress" keycode="VK_END" command="cmd_endLine"/>