cc: Do solid color analysis before scheduling tiles.

cc/debug/rasterize_and_record_benchmark_impl.cc

Index: cc/debug/rasterize_and_record_benchmark_impl.cc
diff --git a/cc/debug/rasterize_and_record_benchmark_impl.cc b/cc/debug/rasterize_and_record_benchmark_impl.cc
index 2d649cc12a894934ba88eecf0311a0bb7f9dbe05..2103762a2e731958919bcc364e88503f9cde823e 100644
--- a/cc/debug/rasterize_and_record_benchmark_impl.cc
+++ b/cc/debug/rasterize_and_record_benchmark_impl.cc
@@ -47,15 +47,13 @@ void RunBenchmark(DisplayListRasterSource* raster_source,
       bitmap.allocPixels(SkImageInfo::MakeN32Premul(content_rect.width(),
                                                     content_rect.height()));
       SkCanvas canvas(bitmap);
-      DisplayListRasterSource::SolidColorAnalysis analysis;
+      SkColor color = SK_ColorTRANSPARENT;
 
-      raster_source->PerformSolidColorAnalysis(content_rect, contents_scale,
-                                               &analysis);
+      *is_solid_color = raster_source->PerformSolidColorAnalysis(

[vmpstr, 2015/12/29 21:24:23]

I'm not sure what to do in this case. This is measuring the raster speed. So, if
solid color analysis is no longer a part of raster, then maybe it should move
outside. 

That is, raster will now not consider solid color tiles. This will affect
benchmarks, but reflect the updated behavior. I think things like thread times
benchmarks still capture all of the behavior changes. 

[sohanjg, 2015/12/30 12:45:47]

We are always issuing PlaybackToCanvas which wouldn't check for solid or normal
content. Only while assigning memory to tiles that we change the logic, so we
will still raster them as before, isnt it ?

is_solid_color will only be used for calculating the number of non -solid tiles
rendered. i think it will be same as inside or out of the do-while loop, and
with or without our changes. But, yes we can save some extra analysis call if we
move out.

+          content_rect, contents_scale, &color);
       raster_source->PlaybackToCanvas(&canvas, content_rect, content_rect,
                                       contents_scale);
 
-      *is_solid_color = analysis.is_solid_color;
-
       timer.NextLap();
     } while (!timer.HasTimeLimitExpired());
     base::TimeDelta duration =