Vulkan: Use SH_INITIALIZE_UNINITIALIZED_LOCALS in ShaderVk

src/libANGLE/renderer/vulkan/ShaderVk.cpp

@@ -26,7 +26,7 @@ ShCompileOptions ShaderVk::prepareSourceAndReturnOptions(std::stringstream *sour
                                                          std::string *sourcePath)
 {
     *sourceStream << mData.getSource();
-    return 0;
+    return SH_INITIALIZE_UNINITIALIZED_LOCALS;
 }
 
 bool ShaderVk::postTranslateCompile(gl::Compiler *compiler, std::string *infoLog)

src/tests/gl_tests/GLSLTest.cpp

@@ -2692,10 +2692,6 @@ TEST_P(GLSLTest_ES3, InitUninitializedLocals)
 // specifically tests with two different struct variables declared in the same block.
 TEST_P(GLSLTest, InitUninitializedStructContainingArrays)
 {
-    // TODO(lucferron): Root cause and fix it. Its also flaky sometimes.
-    // http://anglebug.com/2460
-    ANGLE_SKIP_TEST_IF(IsVulkan());
-
     // Test skipped on Android GLES because local variable initialization is disabled.
     // http://anglebug.com/2046
     ANGLE_SKIP_TEST_IF(IsAndroid() && IsOpenGLES());