Implements core logic for Pixel Canvas

cc/tiles/tile_manager.cc

Index: cc/tiles/tile_manager.cc
diff --git a/cc/tiles/tile_manager.cc b/cc/tiles/tile_manager.cc
index e2d11552268c562607b140c1b0349d73670a49a1..2acd3c9606537e033c9230d393d5bdea7a88ef68 100644
--- a/cc/tiles/tile_manager.cc
+++ b/cc/tiles/tile_manager.cc
@@ -675,11 +675,10 @@ TileManager::PrioritizedWorkToSchedule TileManager::AssignGpuMemoryToTiles() {
       // canvas which is reset between tiles.
       tile->set_solid_color_analysis_performed(true);
       SkColor color = SK_ColorTRANSPARENT;
-      gfx::RectF layer_rect = tile->raster_transform().InverseMapRect(
-          gfx::RectF(tile->content_rect()));
+
       bool is_solid_color =
           prioritized_tile.raster_source()->PerformSolidColorAnalysis(
-              gfx::ToEnclosingRect(layer_rect), 1.f, &color);
+              tile->content_rect(), tile->raster_transform(), &color);
       if (is_solid_color) {
         tile->draw_info().set_solid_color(color);
         client_->NotifyTileStateChanged(tile);