Consider Zoom factor when getting bounding rect.

third_party/WebKit/Source/web/mac/WebSubstringUtil.mm

 /*
  * Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 65 matching lines @@
         if (!layoutObject)
             continue;
 
         const ComputedStyle* style = layoutObject->style();
         const FontPlatformData& fontPlatformData = style->font().primaryFont()->platformData();
         NSFont* font = toNSFont(fontPlatformData.ctFont());
         // If the platform font can't be loaded, it's likely that the site is
         // using a web font. For now, just use the default font instead.
         // TODO(rsesek): Change the font activation flags to allow other processes
         // to use the font.
+        // TODO(shuchen): Support scaling the font as necessary according to CSS transforms.
         if (!font)
-          font = [NSFont systemFontOfSize:style->font().fontDescription().computedSize()];
+            font = [NSFont systemFontOfSize:style->font().fontDescription().computedSize()];
         [attrs setObject:font forKey:NSFontAttributeName];
 
         if (style->visitedDependentColor(CSSPropertyColor).alpha())
             [attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyColor)) forKey:NSForegroundColorAttributeName];
         else
             [attrs removeObjectForKey:NSForegroundColorAttributeName];
         if (style->visitedDependentColor(CSSPropertyBackgroundColor).alpha())
             [attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyBackgroundColor)) forKey:NSBackgroundColorAttributeName];
         else
             [attrs removeObjectForKey:NSBackgroundColorAttributeName];
 
         Vector<UChar> characters;
         it.text().appendTextTo(characters);
         NSString* substring =
             [[[NSString alloc] initWithCharacters:characters.data()
                                            length:characters.size()] autorelease];
         [string replaceCharactersInRange:NSMakeRange(position, 0)
                               withString:substring];
         [string setAttributes:attrs range:NSMakeRange(position, numCharacters)];
         position += numCharacters;
     }
     return [string autorelease];
 }
 
 WebPoint getBaselinePoint(FrameView* frameView, const EphemeralRange& range, NSAttributedString* string)
 {
     // Compute bottom left corner and convert to AppKit coordinates.
-    // TODO(yosin) We shold avoid to create |Range| object. See crbug.com/529985.
-    IntRect stringRect = enclosingIntRect(createRange(range)->boundingRect());
+    // TODO(yosin): We shold avoid to create |Range| object. See crbug.com/529985.
+    // TODO(shuchen): Support page-zoom for getting the baseline point.
+    IntRect stringRect = frameView->contentsToRootFrame(createRange(range)->boundingBox());
     IntPoint stringPoint = stringRect.minXMaxYCorner();
     stringPoint.setY(frameView->height() - stringPoint.y());
 
     // Adjust for the font's descender. AppKit wants the baseline point.
     if ([string length]) {
         NSDictionary* attributes = [string attributesAtIndex:0 effectiveRange:NULL];
         if (NSFont* font = [attributes objectForKey:NSFontAttributeName])
             stringPoint.move(0, ceil(-[font descender]));
     }
     return stringPoint;
@@ skipping 40 matching lines @@
     if (ephemeralRange.isNull())
         return nil;
 
     NSAttributedString* result = attributedSubstringFromRange(ephemeralRange);
     if (baselinePoint)
         *baselinePoint = getBaselinePoint(frame->view(), ephemeralRange, result);
     return result;
 }
 
 } // namespace blink