Decouple Canvas from DisplayList and map Picture and PictureRecorder more directly to their Skia co…

sky/engine/bindings/exception_state.cc

Index: sky/engine/bindings/exception_state.cc
diff --git a/sky/engine/bindings/exception_state.cc b/sky/engine/bindings/exception_state.cc
index 9ba2862515b723ba626eaa867ac95a8e82411630..90eac17955f63dccbb5324b5801ff2e339fa8553 100644
--- a/sky/engine/bindings/exception_state.cc
+++ b/sky/engine/bindings/exception_state.cc
@@ -21,6 +21,7 @@ ExceptionState::ExceptionState(Context context, const char* interfaceName) {
 ExceptionState::~ExceptionState() {
 }
 
+// TODO(iansf): Implement exceptions.
 void ExceptionState::ThrowDOMException(const ExceptionCode&,
                                        const String& message) {
 }