cc: Disable RenderSurface caching.

cc/layer_tree_settings.cc

Index: cc/layer_tree_settings.cc
diff --git a/cc/layer_tree_settings.cc b/cc/layer_tree_settings.cc
index ab12f19b627f7017fbd48903ad90d43b10c11753..40d3cd7f8f374987a57863de58a61f9acf79e85e 100644
--- a/cc/layer_tree_settings.cc
+++ b/cc/layer_tree_settings.cc
@@ -20,6 +20,7 @@ LayerTreeSettings::LayerTreeSettings()
     , renderVSyncEnabled(true)
     , perTilePaintingEnabled(false)
     , partialSwapEnabled(false)
+    , cacheRenderPassContents(true)
     , rightAlignedSchedulingEnabled(false)
     , acceleratedAnimationEnabled(true)
     , pageScalePinchZoomEnabled(false)
@@ -40,6 +41,8 @@ LayerTreeSettings::LayerTreeSettings()
     , maxUntiledLayerSize(gfx::Size(512, 512))
     , minimumOcclusionTrackingSize(gfx::Size(160, 160))
 {
+    // TODO(danakj): Renable surface caching when we can do it more realiably. crbug.com/170713
+    cacheRenderPassContents = false;
 }
 
 LayerTreeSettings::~LayerTreeSettings()