Prefix string16 with base:: in ui/.

ui/views/controls/image_view.cc

 // Copyright (c) 2012 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 "ui/views/controls/image_view.h"
 
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "ui/base/accessibility/accessible_view_state.h"
@@ skipping 159 matching lines @@
   if (va != vert_alignment_) {
     vert_alignment_ = va;
     SchedulePaint();
   }
 }
 
 ImageView::Alignment ImageView::GetVerticalAlignment() const {
   return vert_alignment_;
 }
 
-void ImageView::SetTooltipText(const string16& tooltip) {
+void ImageView::SetTooltipText(const base::string16& tooltip) {
   tooltip_text_ = tooltip;
 }
 
-string16 ImageView::GetTooltipText() const {
+base::string16 ImageView::GetTooltipText() const {
   return tooltip_text_;
 }
 
-bool ImageView::GetTooltipText(const gfx::Point& p, string16* tooltip) const {
+bool ImageView::GetTooltipText(const gfx::Point& p,
+                               base::string16* tooltip) const {
   if (tooltip_text_.empty())
     return false;
 
   *tooltip = GetTooltipText();
   return true;
 }
 
 bool ImageView::HitTestRect(const gfx::Rect& rect) const {
   return interactive_ ? View::HitTestRect(rect) : false;
 }
@@ skipping 18 matching lines @@
         image_bounds.x(), image_bounds.y(), image_bounds.width(),
         image_bounds.height(), true, paint);
   } else {
     canvas->DrawImageInt(image_, image_bounds.x(), image_bounds.y());
   }
   last_painted_bitmap_pixels_ =
       image_.GetRepresentation(last_paint_scale_).sk_bitmap().getPixels();
 }
 
 }  // namespace views