Reland Linux Window Control Alignment

ui/views/window/custom_frame_view.h

Index: ui/views/window/custom_frame_view.h
diff --git a/ui/views/window/custom_frame_view.h b/ui/views/window/custom_frame_view.h
index 1c25f0454d30c4a10e5bc0f80f4c3a4098996560..fe5a3e4c7bd4c8726b9324387e18fedec2ca9404 100644
--- a/ui/views/window/custom_frame_view.h
+++ b/ui/views/window/custom_frame_view.h
@@ -9,6 +9,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/views/controls/button/button.h"
+#include "ui/views/window/frame_buttons.h"
 #include "ui/views/window/non_client_view.h"
 
 namespace gfx {
@@ -29,8 +30,8 @@ class Widget;
 //  rendering the non-standard window caption, border, and controls.
 //
 ////////////////////////////////////////////////////////////////////////////////
-class CustomFrameView : public NonClientFrameView,
-                        public ButtonListener {
+class VIEWS_EXPORT CustomFrameView : public NonClientFrameView,
+                                     public ButtonListener {
  public:
   CustomFrameView();
   virtual ~CustomFrameView();
@@ -59,6 +60,8 @@ class CustomFrameView : public NonClientFrameView,
   virtual void ButtonPressed(Button* sender, const ui::Event& event) OVERRIDE;
 
  private:
+  friend class CustomFrameViewTest;
+
   // Returns the thickness of the border that makes up the window frame edges.
   // This does not include any client edge.
   int FrameBorderThickness() const;
@@ -104,8 +107,13 @@ class CustomFrameView : public NonClientFrameView,
   SkColor GetFrameColor() const;
   const gfx::ImageSkia* GetFrameImage() const;
 
-  // Layout various sub-components of this view.
+  // Performs the layout for the window control buttons based on the
+  // configuration specified in WindowButtonOrderProvider. The sizing and
+  // positions of the buttons affects LayoutTitleBar, call this beforehand.
   void LayoutWindowControls();
+
+  // Calculations depend on the positions of the window controls. Always call
+  // LayoutWindowControls beforehand.
   void LayoutTitleBar();
   void LayoutClientView();
 
@@ -116,6 +124,10 @@ class CustomFrameView : public NonClientFrameView,
                                        int hot_image_id,
                                        int pushed_image_id);
 
+  // Returns the window caption button for the given FrameButton type, if it
+  // should be visible. Otherwise NULL.
+  ImageButton* GetImageButton(views::FrameButton button);
+
   // The bounds of the client view, in this view's coordinates.
   gfx::Rect client_view_bounds_;
 
@@ -140,6 +152,11 @@ class CustomFrameView : public NonClientFrameView,
   // Background painter for the window frame.
   scoped_ptr<FrameBackground> frame_background_;
 
+  // The horizontal boundaries for the title bar to layout within. Restricted
+  // by the space used by the leading and trailing buttons.
+  int minimum_title_bar_x_;
+  int maximum_title_bar_x_;
+
   DISALLOW_COPY_AND_ASSIGN(CustomFrameView);
 };