cc: Make OutputSurface::BindToClient pure virtual and not return bool

android_webview/browser/parent_output_surface.cc

Index: android_webview/browser/parent_output_surface.cc
diff --git a/android_webview/browser/parent_output_surface.cc b/android_webview/browser/parent_output_surface.cc
index 81ae0855cd3da3b98fda0ffb58da4614f2f95b99..f746c2155234a32d02ccb666c3e7a848adc622ba 100644
--- a/android_webview/browser/parent_output_surface.cc
+++ b/android_webview/browser/parent_output_surface.cc
@@ -20,10 +20,7 @@ ParentOutputSurface::ParentOutputSurface(
 ParentOutputSurface::~ParentOutputSurface() {
 }
 
-void ParentOutputSurface::DidLoseOutputSurface() {
-  // Android WebView does not handle context loss.
-  LOG(FATAL) << "Render thread context loss";
-}
+void ParentOutputSurface::BindToClient(cc::OutputSurfaceClient* client) {}
 
 void ParentOutputSurface::EnsureBackbuffer() {}