SearchBoxView now enables/disables cursor based on user interaction.

ui/app_list/views/search_box_view.h

Index: ui/app_list/views/search_box_view.h
diff --git a/ui/app_list/views/search_box_view.h b/ui/app_list/views/search_box_view.h
index b03fdc6fd1886065ee1e6406064ccca6a033b74d..5ff5bc334490502d407700e6af862178ab314c38 100644
--- a/ui/app_list/views/search_box_view.h
+++ b/ui/app_list/views/search_box_view.h
@@ -81,10 +81,21 @@ class APP_LIST_EXPORT SearchBoxView : public views::View,
   // Sets voice label for Back button depending on whether a folder is open.
   void SetBackButtonLabel(bool folder);
 
+  // Whether the search box is active.
+  bool is_search_box_active() const { return is_search_box_active_; }
+
+  // Setting the search  box active left aligns the placeholder text, changes
+  // the color of the placeholder text, and enables cursor blink. Setting the
+  // search box inactive center aligns the placeholder text, sets the color, and
+  // disables cursor blink.
+  void SetSearchBoxActive(bool active);
+
   // Overridden from views::View:
   bool OnMouseWheel(const ui::MouseWheelEvent& event) override;
   void OnEnabledChanged() override;
   const char* GetClassName() const override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
+  void OnMouseEvent(ui::MouseEvent* event) override;
 
  private:
   // Updates model text and selection model with current Textfield info.
@@ -98,6 +109,10 @@ class APP_LIST_EXPORT SearchBoxView : public views::View,
                        const base::string16& new_contents) override;
   bool HandleKeyEvent(views::Textfield* sender,
                       const ui::KeyEvent& key_event) override;
+  bool HandleMouseEvent(views::Textfield* sender,
+                        const ui::MouseEvent& mouse_event) override;
+  bool HandleGestureEvent(views::Textfield* sender,
+                          const ui::GestureEvent& gesture_event) override;
 
   // Overridden from views::ButtonListener:
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
@@ -128,6 +143,8 @@ class APP_LIST_EXPORT SearchBoxView : public views::View,
 
   // Whether the fullscreen app list feature is enabled.
   const bool is_fullscreen_app_list_enabled_;
+  // Whether the search box is active.
+  bool is_search_box_active_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBoxView);
 };