Prefix string16 with base:: in ui/.

ui/views/examples/examples_window.cc

Index: ui/views/examples/examples_window.cc
diff --git a/ui/views/examples/examples_window.cc b/ui/views/examples/examples_window.cc
index 041199286d13f2691a9fe1b9a09dce8237221e50..b8bcf50c497b5a56baf3034f72ab7c214ace327b 100644
--- a/ui/views/examples/examples_window.cc
+++ b/ui/views/examples/examples_window.cc
@@ -51,7 +51,7 @@ class ComboboxModelExampleList : public ui::ComboboxModel {
 
   // Overridden from ui::ComboboxModel:
   virtual int GetItemCount() const OVERRIDE { return example_list_.size(); }
-  virtual string16 GetItemAt(int index) OVERRIDE {
+  virtual base::string16 GetItemAt(int index) OVERRIDE {
     return UTF8ToUTF16(example_list_[index]->example_title());
   }
 
@@ -97,7 +97,7 @@ class ExamplesWindowContents : public WidgetDelegateView,
   // Overridden from WidgetDelegateView:
   virtual bool CanResize() const OVERRIDE { return true; }
   virtual bool CanMaximize() const OVERRIDE { return true; }
-  virtual string16 GetWindowTitle() const OVERRIDE {
+  virtual base::string16 GetWindowTitle() const OVERRIDE {
     return ASCIIToUTF16("Views Examples");
   }
   virtual View* GetContentsView() OVERRIDE { return this; }