cc: Make tiling interest rect calc based on viewport.

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index df8674a24e1730b1cb2f621e17988549de0b1767..f7dc58fc138ac5faabf380e5ede4b7bbee197be0 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -349,15 +349,6 @@ void RenderWidgetCompositor::Initialize() {
         &settings.initial_debug_state.slow_down_raster_scale_factor);
   }
 
-  if (cmd->HasSwitch(cc::switches::kMaxTilesForInterestArea)) {
-    int max_tiles_for_interest_area;
-    if (GetSwitchValueAsInt(*cmd,
-                            cc::switches::kMaxTilesForInterestArea,
-                            1, std::numeric_limits<int>::max(),
-                            &max_tiles_for_interest_area))
-      settings.max_tiles_for_interest_area = max_tiles_for_interest_area;
-  }
-
   if (cmd->HasSwitch(cc::switches::kMaxUnusedResourceMemoryUsagePercentage)) {
     int max_unused_resource_memory_percentage;
     if (GetSwitchValueAsInt(