Revert workaround due to perf regression

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index da05c5ff6b54a849cce60518ba0aa959a9fc4018..7570ec574af11fad0aa49c07464168a42ba1ff14 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -892,10 +892,6 @@ void RenderView::ApplyWebPreferences(const WebPreferences& prefs,
   settings->setAccelerated2dCanvasMSAASampleCount(
       prefs.accelerated_2d_canvas_msaa_sample_count);
 
-  // Force readback from 2D canvas to use software code path. crbug.com/665656
-  settings->setForceSoftwareReadbackFrom2DCanvas(
-      prefs.force_software_readback_from_2d_canvas);
-
   // Tabs to link is not part of the settings. WebCore calls
   // ChromeClient::tabsToLinks which is part of the glue code.
   web_view->setTabsToLinks(prefs.tabs_to_links);