Uniforms and attributes name conflicts should cause link failure

gpu/command_buffer/service/program_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 177 matching lines @@
 
   // Detects if there are uniforms of the same name but different type
   // or precision in vertex/fragment shaders.
   // Return true if such cases are detected.
   bool DetectUniformsMismatch() const;
 
   // Return true if a varying is statically used in fragment shader, but it
   // 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;
 
   // Visible for testing
   const LocationMap& bind_attrib_location_map() const {
     return bind_attrib_location_map_;
   }
 
  private:
@@ skipping 201 matching lines @@
 
   uint32 max_varying_vectors_;
 
   DISALLOW_COPY_AND_ASSIGN(ProgramManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_