android webview: allow cc to fail hardware draw

content/renderer/android/synchronous_compositor_output_surface.cc

Index: content/renderer/android/synchronous_compositor_output_surface.cc
diff --git a/content/renderer/android/synchronous_compositor_output_surface.cc b/content/renderer/android/synchronous_compositor_output_surface.cc
index 39dea1b080e33180bfcf8c393b575f806492dd42..ac50424cf606333b4ccc8bbabc032bb423b7873e 100644
--- a/content/renderer/android/synchronous_compositor_output_surface.cc
+++ b/content/renderer/android/synchronous_compositor_output_surface.cc
@@ -76,7 +76,6 @@ SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
       frame_swap_message_queue_(frame_swap_message_queue) {
   thread_checker_.DetachFromThread();
   DCHECK(registry_);
-  capabilities_.draw_and_swap_full_viewport_every_frame = true;
   capabilities_.adjust_deadline_for_parent = false;
   capabilities_.delegated_rendering = true;
   capabilities_.max_frames_pending = 1;
@@ -195,7 +194,9 @@ void SynchronousCompositorOutputSurface::InvokeComposite(
   SetExternalDrawConstraints(adjusted_transform, viewport, clip,
                              viewport_rect_for_tile_priority,
                              transform_for_tile_priority, !hardware_draw);
-  SetNeedsRedrawRect(gfx::Rect(viewport.size()));
+  if (!hardware_draw) {
+    SetNeedsRedrawRect(gfx::Rect(viewport.size()));
+  }
 
   client_->OnDraw();