cc: Stop converting update rect from int to float to int.

cc/layers/tiled_layer.cc

 // Copyright 2011 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.
 
 #include "cc/layers/tiled_layer.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/auto_reset.h"
@@ skipping 270 matching lines @@
 
   added_tile->dirty_rect = tiler_->TileRect(added_tile);
 
   // Temporary diagnostic crash.
   CHECK(added_tile);
   CHECK(TileAt(i, j));
 
   return added_tile;
 }
 
-void TiledLayer::SetNeedsDisplayRect(const gfx::RectF& dirty_rect) {
+void TiledLayer::SetNeedsDisplayRect(const gfx::Rect& dirty_rect) {
   InvalidateContentRect(LayerRectToContentRect(dirty_rect));
   ContentsScalingLayer::SetNeedsDisplayRect(dirty_rect);
 }
 
 void TiledLayer::InvalidateContentRect(const gfx::Rect& content_rect) {
   UpdateBounds();
   if (tiler_->is_empty() || content_rect.IsEmpty() || skips_draw_)
     return;
 
   for (LayerTilingData::TileMap::const_iterator iter = tiler_->tiles().begin();
@@ skipping 155 matching lines @@
                                     int left,
                                     int top,
                                     int right,
                                     int bottom,
                                     ResourceUpdateQueue* queue,
                                     const OcclusionTracker<Layer>* occlusion) {
   // The update_rect should be in layer space. So we have to convert the
   // paint_rect from content space to layer space.
   float width_scale = 1 / draw_properties().contents_scale_x;
   float height_scale = 1 / draw_properties().contents_scale_y;
-  update_rect_ = gfx::ScaleRect(update_rect, width_scale, height_scale);
+  update_rect_ =
+      gfx::ScaleToEnclosingRect(update_rect, width_scale, height_scale);
 
   // Calling PrepareToUpdate() calls into WebKit to paint, which may have the
   // side effect of disabling compositing, which causes our reference to the
   // texture updater to be deleted.  However, we can't free the memory backing
   // the SkCanvas until the paint finishes, so we grab a local reference here to
   // hold the updater alive until the paint completes.
   scoped_refptr<LayerUpdater> protector(Updater());
   Updater()->PrepareToUpdate(content_bounds(),
                              paint_rect,
                              tiler_->tile_size(),
@@ skipping 382 matching lines @@
   gfx::Rect prepaint_rect = visible_content_rect();
   prepaint_rect.Inset(-tiler_->tile_size().width() * kPrepaintColumns,
                       -tiler_->tile_size().height() * kPrepaintRows);
   gfx::Rect content_rect(content_bounds());
   prepaint_rect.Intersect(content_rect);
 
   return prepaint_rect;
 }
 
 }  // namespace cc