Remove Platform::cryptographicallyRandomValues

sky/engine/core/animation/CompositorAnimationsTestHelper.h

Index: sky/engine/core/animation/CompositorAnimationsTestHelper.h
diff --git a/sky/engine/core/animation/CompositorAnimationsTestHelper.h b/sky/engine/core/animation/CompositorAnimationsTestHelper.h
index 9cb7eb352154abd89382cd3f8aba18d3136535bd..46955fbdfe824d490a870ea4e48ba71648bea016 100644
--- a/sky/engine/core/animation/CompositorAnimationsTestHelper.h
+++ b/sky/engine/core/animation/CompositorAnimationsTestHelper.h
@@ -127,8 +127,6 @@ private:
     class PlatformProxy : public Platform {
     public:
         PlatformProxy(WebCompositorSupportMock** compositor) : m_compositor(compositor) { }
-
-        virtual void cryptographicallyRandomValues(unsigned char* buffer, size_t length) { ASSERT_NOT_REACHED(); }
     private:
         WebCompositorSupportMock** m_compositor;
         virtual WebCompositorSupport* compositorSupport() override { return *m_compositor; }