Make the DimensionHandle version of computing windowed output size

public.
Change: 137774322

tensorflow/core/framework/common_shape_fns.cc

@@ -70,8 +70,6 @@ Status Get3dOutputSize(const std::array<int64, 3>& input,
 
 namespace shape_inference {
 
-namespace {
-
 Status GetWindowedOutputSizeFromDims(
     shape_inference::InferenceContext* c,
     shape_inference::DimensionHandle input_size,
@@ -97,7 +95,6 @@ Status GetWindowedOutputSizeFromDims(
   }
   return Status::OK();
 }
-}  // namespace
 
 Status UnchangedShape(shape_inference::InferenceContext* c) {
   c->set_output(0, c->input(0));

tensorflow/core/framework/common_shape_fns.h

@@ -96,6 +96,13 @@ Status Get3dOutputSize(const std::array<int64, 3>& input,
 
 namespace shape_inference {
 
+// Like GetWindowedOutputSize, but deals with DimensionHandles.
+Status GetWindowedOutputSizeFromDims(InferenceContext* c,
+                                     DimensionHandle input_size,
+                                     DimensionOrConstant filter_size,
+                                     int64 stride, Padding padding_type,
+                                     DimensionHandle* output_size);
+
 // Transfers shape of input(0) to output(0).
 Status UnchangedShape(shape_inference::InferenceContext* c);