Finish the rename from cc::GraphicsContext to cc::OutputSurface

cc/scheduler.h

Index: cc/scheduler.h
diff --git a/cc/scheduler.h b/cc/scheduler.h
index ffe03cf215d2628a959735791e06474c8c652a48..9beffc55da30aa15a2ed06289a130af507ec9bfd 100644
--- a/cc/scheduler.h
+++ b/cc/scheduler.h
@@ -79,8 +79,8 @@ public:
     void setSwapBuffersCompleteSupported(bool);
     void didSwapBuffersComplete();
 
-    void didLoseContext();
-    void didRecreateContext();
+    void didLoseOutputSurface();
+    void didRecreateOutputSurface();
 
     bool commitPending() const { return m_stateMachine.commitPending(); }
     bool redrawPending() const { return m_stateMachine.redrawPending(); }