Add --draw-view-bounds-rects to draw bounds rects for all views.

ui/views/view.h

 // 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.
 
 #ifndef UI_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <stddef.h>
 
 #include <algorithm>
@@ skipping 43 matching lines @@
 
 namespace ui {
 struct AXActionData;
 struct AXNodeData;
 class Compositor;
 class InputMethod;
 class Layer;
 class NativeTheme;
 class PaintContext;
 class ThemeProvider;
+class TransformRecorder;
 }
 
 namespace views {
 
 class Background;
 class Border;
 class ContextMenuController;
 class DragController;
 class FocusManager;
 class FocusTraversable;
@@ skipping 1210 matching lines @@
     SCHEDULE_PAINT_SIZE_CHANGED
   };
 
   // Invoked before and after the bounds change to schedule painting the old and
   // new bounds.
   void SchedulePaintBoundsChanged(SchedulePaintType type);
 
   // Schedules a paint on the parent View if it exists.
   void SchedulePaintOnParent();
 
+  // Returns whether this view is eligible for painting, i.e. is visible and
+  // nonempty.  Note that this does not behave like IsDrawn(), since it doesn't
+  // check ancestors recursively; rather, it's used to prune subtrees of views
+  // during painting.
+  bool ShouldPaint() const;
+
+  // Returns the offset that should be used when constructing the paint context
+  // for this view.
+  gfx::Vector2d GetPaintContextOffset() const;
+
+  // Adjusts the transform of |recorder| in advance of painting.
+  void SetupTransformRecorderForPainting(ui::TransformRecorder* recorder) const;
+
+  // Recursively calls the painting method |func| on all non-layered children,
+  // in Z order.
+  void RecursivePaintHelper(void (View::*func)(const ui::PaintContext&),
+                            const ui::PaintContext& context);
+
+  // Invokes Paint() and, if necessary, PaintDebugRects().  Should be called
+  // only on the root of a widget/layer.  PaintDebugRects() is invoked as a
+  // separate pass, instead of being rolled into Paint(), so that siblings will
+  // not obscure debug rects.
+  void PaintFromPaintRoot(const ui::PaintContext& parent_context);
+
+  // Draws a semitransparent rect to indicate the bounds of this view.
+  // Recursively does the same for all children.  Invoked only with
+  // --draw-view-bounds-rects.
+  void PaintDebugRects(const ui::PaintContext& parent_context);
+
   // Tree operations -----------------------------------------------------------
 
   // Removes |view| from the hierarchy tree.  If |update_focus_cycle| is true,
   // the next and previous focusable views of views pointing to this view are
   // updated.  If |update_tool_tip| is true, the tooltip is updated.  If
   // |delete_removed_view| is true, the view is also deleted (if it is parent
   // owned).  If |new_parent| is not NULL, the remove is the result of
   // AddChildView() to a new parent.  For this case, |new_parent| is the View
   // that |view| is going to be added to after the remove completes.
   void DoRemoveChildView(View* view,
@@ skipping 336 matching lines @@
   // Observers -------------------------------------------------------------
 
   base::ObserverList<ViewObserver> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_