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

cc/layers/picture_layer.cc

 // Copyright 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.
 
 #include "cc/layers/picture_layer.h"
 
 #include "base/auto_reset.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/trees/layer_tree_impl.h"
@@ skipping 50 matching lines @@
   if (host) {
     pile_->SetMinContentsScale(host->settings().minimum_contents_scale);
     pile_->SetTileGridSize(host->settings().default_tile_size);
     pile_->set_slow_down_raster_scale_factor(
         host->debug_state().slow_down_raster_scale_factor);
     pile_->set_show_debug_picture_borders(
         host->debug_state().show_picture_borders);
   }
 }
 
-void PictureLayer::SetNeedsDisplayRect(const gfx::RectF& layer_rect) {
-  gfx::Rect rect = gfx::ToEnclosedRect(layer_rect);
-  if (!rect.IsEmpty()) {
+void PictureLayer::SetNeedsDisplayRect(const gfx::Rect& layer_rect) {
+  if (!layer_rect.IsEmpty()) {
     // Clamp invalidation to the layer bounds.
-    rect.Intersect(gfx::Rect(bounds()));
-    pending_invalidation_.Union(rect);
+    pending_invalidation_.Union(
+        gfx::IntersectRects(layer_rect, gfx::Rect(bounds())));
   }
   Layer::SetNeedsDisplayRect(layer_rect);
 }
 
 bool PictureLayer::Update(ResourceUpdateQueue* queue,
                           const OcclusionTracker<Layer>* occlusion) {
   update_source_frame_number_ = layer_tree_host()->source_frame_number();
   bool updated = Layer::Update(queue, occlusion);
 
   {
@@ skipping 116 matching lines @@
 
 bool PictureLayer::HasDrawableContent() const {
   return client_ && Layer::HasDrawableContent();
 }
 
 void PictureLayer::RunMicroBenchmark(MicroBenchmark* benchmark) {
   benchmark->RunOnLayer(this);
 }
 
 }  // namespace cc