D3D: Return an empty string when the translated shader source is empty.

TEST=conformance/extensions/webgl-debug-shaders BUG=angleproject:1991 Change-Id: Id210ec43501c4e4f3db2c8a0aec25e1d20b18d33 Reviewed-on: https://chromium-review.googlesource.com/475992 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

D3D: Return an empty string when the translated shader source is empty.
b36e5393 · Geoff Lang · Commit Bot · 33151a53 · b36e5393
Commit b36e5393 authored Apr 12, 2017 by Geoff Lang Committed by Commit Bot Apr 18, 2017
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ShaderD3D.cpp src/libANGLE/renderer/d3d/ShaderD3D.cpp +5 -0

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--- a/src/libANGLE/renderer/d3d/ShaderD3D.cpp
+++ b/src/libANGLE/renderer/d3d/ShaderD3D.cpp
@@ -78,6 +78,11 @@ ShaderD3D::~ShaderD3D()
 std::string ShaderD3D::getDebugInfo() const
 {
+    if (mDebugInfo.empty())
+    {
+        return "";
+    }
    return mDebugInfo + std::string("\n// ") + GetShaderTypeString(mData.getShaderType()) +
           " SHADER END\n";
 }