Make adjustedSelectionStartForStyleComputation() to take Position instead of VisibleSeleciton

third_party/WebKit/Source/core/editing/EditingUtilities.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 2030 matching lines @@
          element.hasTagName(h3Tag) || element.hasTagName(h4Tag) ||
          element.hasTagName(h5Tag);
 }
 
 bool isBlockFlowElement(const Node& node) {
   LayoutObject* layoutObject = node.layoutObject();
   return node.isElementNode() && layoutObject &&
          layoutObject->isLayoutBlockFlow();
 }
 
-Position adjustedSelectionStartForStyleComputation(
-    const VisibleSelection& selection) {
+Position adjustedSelectionStartForStyleComputation(const Position& position) {
   // This function is used by range style computations to avoid bugs like:
   // <rdar://problem/4017641> REGRESSION (Mail): you can only bold/unbold a
   // selection starting from end of line once
   // It is important to skip certain irrelevant content at the start of the
   // selection, so we do not wind up with a spurious "mixed" style.
 
-  VisiblePosition visiblePosition = createVisiblePosition(selection.start());
+  VisiblePosition visiblePosition = createVisiblePosition(position);
   if (visiblePosition.isNull())
     return Position();
 
-  // if the selection is a caret, just return the position, since the style
-  // behind us is relevant
-  if (selection.isCaret())
-    return visiblePosition.deepEquivalent();
-
   // if the selection starts just before a paragraph break, skip over it
   if (isEndOfParagraph(visiblePosition))
     return mostForwardCaretPosition(
         nextPositionOf(visiblePosition).deepEquivalent());
 
   // otherwise, make sure to be at the start of the first selected node,
   // instead of possibly at the end of the last node before the selection
   return mostForwardCaretPosition(visiblePosition.deepEquivalent());
 }
 
@@ skipping 101 matching lines @@
         return InputType::DeleteWordBackward;
       if (granularity == LineBoundary)
         return InputType::DeleteLineBackward;
       return InputType::DeleteContentBackward;
     default:
       return InputType::None;
   }
 }
 
 }  // namespace blink