Combobox: Rename styles to STYLE_NORMAL and STYLE_ACTION and modify behaviors

ui/views/controls/combobox/combobox_unittest.cc

Index: ui/views/controls/combobox/combobox_unittest.cc
diff --git a/ui/views/controls/combobox/combobox_unittest.cc b/ui/views/controls/combobox/combobox_unittest.cc
index 580b79f0245801a02b90f94d66efced477dc7ec6..da7bed704efc9c1117b7fbfa6c4296a0664fb996 100644
--- a/ui/views/controls/combobox/combobox_unittest.cc
+++ b/ui/views/controls/combobox/combobox_unittest.cc
@@ -117,6 +117,29 @@ class TestComboboxModel : public ui::ComboboxModel {
   DISALLOW_COPY_AND_ASSIGN(TestComboboxModel);
 };
 
+// A combobox model which refers to a vector.
+class VectorComboboxModel : public ui::ComboboxModel {
+ public:
+  VectorComboboxModel(std::vector<std::string>* values)
+      : values_(values) {
+  }
+  virtual ~VectorComboboxModel() {}
+
+  // ui::ComboboxModel:
+  virtual int GetItemCount() const OVERRIDE {
+    return values_->size();
+  }
+  virtual base::string16 GetItemAt(int index) OVERRIDE {
+    return ASCIIToUTF16(values_->at(index));
+  }
+  virtual bool IsItemSeparatorAt(int index) OVERRIDE {
+    return false;
+  }
+
+ private:
+  std::vector<std::string>* values_;
+};
+
 class EvilListener : public ComboboxListener {
  public:
   EvilListener() : deleted_(false) {};
@@ -556,4 +579,40 @@ TEST_F(ComboboxTest, ConsumingPressKeyEvents) {
       ui::KeyEvent(ui::ET_KEY_PRESSED, ui::VKEY_SPACE, 0, false)));
 }
 
+TEST_F(ComboboxTest, ContentWidth) {
+  std::vector<std::string> values;
+
+  scoped_ptr<VectorComboboxModel> model(new VectorComboboxModel(&values));
+  combobox_ = new TestCombobox(model.get());
+
+  std::string long_item = "this is the long item";
+  std::string short_item = "s";
+
+  values.resize(1);
+  values[0] = long_item;
+  combobox_->ModelChanged();
+
+  const int long_item_width = combobox_->content_size_.width();
+
+  values[0] = short_item;
+  combobox_->ModelChanged();
+
+  const int short_item_width = combobox_->content_size_.width();
+
+  values.resize(2);
+  values[0] = short_item;
+  values[1] = long_item;
+  combobox_->ModelChanged();
+
+  // When the style is STYLE_SHOW_DROP_DOWN_ON_CLICK, the width will fit with
+  // the longest item.
+  combobox_->SetStyle(Combobox::STYLE_SHOW_DROP_DOWN_ON_CLICK);
+  EXPECT_EQ(long_item_width, combobox_->content_size_.width());
+
+  // When the style is STYLE_NOTIFY_ON_CLICK, the width will fit with the first
+  // items' width.
+  combobox_->SetStyle(Combobox::STYLE_NOTIFY_ON_CLICK);
+  EXPECT_EQ(short_item_width, combobox_->content_size_.width());
+}
+
 }  // namespace views