RenderText: Only clip if necessary to workaround a Skia bug in the PDF path.

ui/gfx/render_text.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_GFX_RENDER_TEXT_H_
 #define UI_GFX_RENDER_TEXT_H_
 #pragma once
 
 #include <algorithm>
 #include <cstring>
@@ skipping 150 matching lines @@
   SkColor selection_background_unfocused_color() const {
     return selection_background_unfocused_color_;
   }
   void set_selection_background_unfocused_color(SkColor color) {
     selection_background_unfocused_color_ = color;
   }
 
   bool focused() const { return focused_; }
   void set_focused(bool focused) { focused_ = focused; }
 
+  bool clip_to_display_rect() const { return clip_to_display_rect_; }
+  void set_clip_to_display_rect(bool clip) { clip_to_display_rect_ = clip; }
+
   const StyleRange& default_style() const { return default_style_; }
   void set_default_style(const StyleRange& style) { default_style_ = style; }
 
   // In an obscured (password) field, all text is drawn as asterisks or bullets.
   bool is_obscured() const { return obscured_; }
   void SetObscured(bool obscured);
 
   const Rect& display_rect() const { return display_rect_; }
   void SetDisplayRect(const Rect& r);
 
@@ skipping 292 matching lines @@
   // Fade text head and/or tail, if text doesn't fit into |display_rect_|.
   bool fade_head_;
   bool fade_tail_;
 
   // Is the background transparent (either partially or fully)?
   bool background_is_transparent_;
 
   // The local display area for rendering the text.
   Rect display_rect_;
 
+  // Flag to work around a Skia bug with the PDF path (http://crbug.com/133548)
+  // that results in incorrect clipping when drawing to the document margins.
+  // This field allows disabling clipping to work around the issue.
+  // TODO(asvitkine): Remove this when the underlying Skia bug is fixed.
+  bool clip_to_display_rect_;
+
   // The offset for the text to be drawn, relative to the display area.
   // Get this point with GetUpdatedDisplayOffset (or risk using a stale value).
   Point display_offset_;
 
   // The cached bounds and offset are invalidated by changes to the cursor,
   // selection, font, and other operations that adjust the visible text bounds.
   bool cached_bounds_and_offset_valid_;
 
   // Text shadows to be drawn.
   ShadowValues text_shadows_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderText);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_RENDER_TEXT_H_