Uniforms and attributes name conflicts should cause link failure

gpu/command_buffer/service/program_manager.h

Index: gpu/command_buffer/service/program_manager.h
diff --git a/gpu/command_buffer/service/program_manager.h b/gpu/command_buffer/service/program_manager.h
index c995e2f2eb39f1143250d79dd85179e3cee2c570..c6c361bc9c630c46f8156dec2a17abe804adc6c1 100644
--- a/gpu/command_buffer/service/program_manager.h
+++ b/gpu/command_buffer/service/program_manager.h
@@ -195,6 +195,9 @@ class GPU_EXPORT Program : public base::RefCounted<Program> {
   // is not declared in vertex shader.
   bool DetectVaryingsMismatch() const;
 
+  // Return true if a varying or an attribute share the same name.
+  bool DetectGlobalNameConflicts() const;
+
   // Return false if varyings can't be packed into the max available
   // varying registers.
   bool CheckVaryingsPacking() const;