Finish plumbing for CALayerOverlay filter.

BUG=602103
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2162713002
Cr-Commit-Position: refs/heads/master@{#406154}

cc/output/gl_renderer.cc

@@ -3657,7 +3657,7 @@ void GLRenderer::ScheduleCALayers(DrawingFrame* frame) {
     GLint sorting_context_id = ca_layer_overlay.sorting_context_id;
     GLfloat transform[16];
     ca_layer_overlay.transform.asColMajorf(transform);
-    unsigned filter = GL_LINEAR;
+    unsigned filter = ca_layer_overlay.filter;
     gl_->ScheduleCALayerCHROMIUM(
         texture_id, contents_rect, ca_layer_overlay.opacity,
         ca_layer_overlay.background_color, ca_layer_overlay.edge_aa_mask,