Display transparent text when it's being searched and selected.

Source/core/paint/InlineTextBoxPainter.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/InlineTextBoxPainter.h"
 
 #include "core/dom/DocumentMarkerController.h"
 #include "core/dom/RenderedDocumentMarker.h"
 #include "core/editing/CompositionUnderline.h"
@@ skipping 795 matching lines @@
     TextRun run = m_inlineTextBox.constructTextRun(style, font);
 
     // Optionally highlight the text
     if (m_inlineTextBox.layoutObject().frame()->editor().markedTextMatchesAreHighlighted()) {
         Color color = marker->activeMatch() ?
             LayoutTheme::theme().platformActiveTextSearchHighlightColor() :
             LayoutTheme::theme().platformInactiveTextSearchHighlightColor();
         GraphicsContextStateSaver stateSaver(*pt);
         pt->clip(FloatRect(boxOrigin.x().toFloat(), (boxOrigin.y() - deltaY).toFloat(), m_inlineTextBox.logicalWidth().toFloat(), selHeight));
         pt->drawHighlightForText(font, run, FloatPoint(boxOrigin.x().toFloat(), (boxOrigin.y() - deltaY).toFloat()), selHeight, color, sPos, ePos);
+
+        // Also Highlight the text with color:transparent
+        if (style.visitedDependentColor(CSSPropertyColor) == Color::transparent) {
+            int length = m_inlineTextBox.len();
+            StringView string = m_inlineTextBox.layoutObject().text().createView();
+            TextRun textRun = m_inlineTextBox.constructTextRun(style, font, string, length, 0);

[pdr., 2015/07/21 22:03:57]

You're constructing a new textrun here. Why doesn't the textrun from above (line
806) work?

+            TextPainter::Style textStyle = TextPainter::textPaintingStyle(m_inlineTextBox.layoutObject(), style, true, false);
+            LayoutRect boxRect(boxOrigin, LayoutSize(m_inlineTextBox.logicalWidth(), m_inlineTextBox.logicalHeight()));
+            LayoutPoint textOrigin(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());
+            TextPainter textPainter(pt, font, textRun, textOrigin, boxRect, m_inlineTextBox.isHorizontal());
+
+            textPainter.paint(sPos, ePos, length, textStyle, 0);
+        }
     }
 }
 
 
 } // namespace blink