Add a flag to disable partial raster in renderer

cc/trees/layer_tree_host_pixeltest_tiles.cc

Index: cc/trees/layer_tree_host_pixeltest_tiles.cc
diff --git a/cc/trees/layer_tree_host_pixeltest_tiles.cc b/cc/trees/layer_tree_host_pixeltest_tiles.cc
index f013e989d3c3f9fa8adaffd068ac4aeeb38bd946..6331aaca94bf999f235bdf2a6fdc74eb1d314aba 100644
--- a/cc/trees/layer_tree_host_pixeltest_tiles.cc
+++ b/cc/trees/layer_tree_host_pixeltest_tiles.cc
@@ -32,18 +32,19 @@ class LayerTreeHostTilesPixelTest : public LayerTreePixelTest {
     switch (raster_mode_) {
       case PARTIAL_ONE_COPY:
         settings->use_zero_copy = false;
-        settings->use_persistent_map_for_gpu_memory_buffers = true;
+        settings->use_partial_raster = true;
         break;
       case FULL_ONE_COPY:
         settings->use_zero_copy = false;
-        settings->use_persistent_map_for_gpu_memory_buffers = false;
+        settings->use_partial_raster = false;
         break;
       case BITMAP:
-        // This is done via context creation. No settings to change here!
+        settings->use_partial_raster = true;
         break;
       case GPU:
         settings->gpu_rasterization_enabled = true;
         settings->gpu_rasterization_forced = true;
+        settings->use_partial_raster = true;
         break;
     }
   }