Bug 1099557 - Make -moz-control-character-visibility default to 'visible' rather than 'hidden', so that spurious control characters are rendered as hexboxes. r=dbaron

layout/style/nsRuleNode.cpp

@@ -4364,13 +4364,13 @@ nsRuleNode::ComputeTextData(void* aStartStruct,
               parentText->mTextCombineUpright,
               NS_STYLE_TEXT_COMBINE_UPRIGHT_NONE, 0, 0, 0, 0);
 
-  // -moz-text-discard: enum, inherit, initial
+  // -moz-control-character-visibility: enum, inherit, initial
   SetDiscrete(*aRuleData->ValueForControlCharacterVisibility(),
               text->mControlCharacterVisibility,
               conditions,
               SETDSC_ENUMERATED | SETDSC_UNSET_INHERIT,
               parentText->mControlCharacterVisibility,
-              NS_STYLE_CONTROL_CHARACTER_VISIBILITY_HIDDEN, 0, 0, 0, 0);
+              NS_STYLE_CONTROL_CHARACTER_VISIBILITY_VISIBLE, 0, 0, 0, 0);
 
   COMPUTE_END_INHERITED(Text, text)
 }

layout/style/nsStyleStruct.cpp

@@ -3408,7 +3408,7 @@ nsStyleText::nsStyleText(void)
   mRubyPosition = NS_STYLE_RUBY_POSITION_OVER;
   mTextSizeAdjust = NS_STYLE_TEXT_SIZE_ADJUST_AUTO;
   mTextCombineUpright = NS_STYLE_TEXT_COMBINE_UPRIGHT_NONE;
-  mControlCharacterVisibility = NS_STYLE_CONTROL_CHARACTER_VISIBILITY_HIDDEN;
+  mControlCharacterVisibility = NS_STYLE_CONTROL_CHARACTER_VISIBILITY_VISIBLE;
 
   mLetterSpacing.SetNormalValue();
   mLineHeight.SetNormalValue();