cc: Remove cheapness estimator usage from tile manager.

cc/resources/picture_pile_impl.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 <algorithm>
 #include <limits>
 
 #include "base/debug/trace_event.h"
 #include "cc/base/region.h"
 #include "cc/debug/debug_colors.h"
@@ skipping 245 matching lines @@
   empty_bitmap.setConfig(SkBitmap::kNo_Config,
                          content_rect.width(),
                          content_rect.height());
   skia::AnalysisDevice device(empty_bitmap);
   skia::AnalysisCanvas canvas(&device);
 
   Raster(&canvas, content_rect, contents_scale, NULL);
 
   analysis->is_transparent = canvas.isTransparent();
   analysis->is_solid_color = canvas.getColorIfSolid(&analysis->solid_color);
-  analysis->is_cheap_to_raster = canvas.isCheap();
   analysis->has_text = canvas.hasText();
   canvas.consumeLazyPixelRefs(&analysis->lazy_pixel_refs);
 }
 
 PicturePileImpl::Analysis::Analysis()
   : is_solid_color(false),
     is_transparent(false),
-    has_text(false),
-    is_cheap_to_raster(false) {
+    has_text(false) {
 }
 
 PicturePileImpl::Analysis::~Analysis() {
 }
 
 PicturePileImpl::PixelRefIterator::PixelRefIterator(
     gfx::Rect content_rect,
     float contents_scale,
     const PicturePileImpl* picture_pile)
     : picture_pile_(picture_pile),
@@ skipping 47 matching lines @@
           layer_rect_,
           *picture_list_iterator_);
       if (pixel_ref_iterator_)
         return;
     }
     ++tile_iterator_;
   } while (AdvanceToTileWithPictures());
 }
 
 }  // namespace cc