Fixed some warnings.

command_buffer/service/cross/gl/effect_gl.cc

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 200 matching lines @@
       if (vp_param) cgSetParameter1i(vp_param, *static_cast<const int *>(data));
       if (fp_param) cgSetParameter1i(fp_param, *static_cast<const int *>(data));
       break;
     case effect_param::BOOL: {
       int bool_value = *static_cast<const bool *>(data)?1:0;
       if (vp_param) cgSetParameter1i(vp_param, bool_value);
       if (fp_param) cgSetParameter1i(fp_param, bool_value);
       break;
     }
     case effect_param::SAMPLER: {
-      DCHECK_GE(low_level_param.sampler_ids.size(), 1);
+      DCHECK_GE(low_level_param.sampler_ids.size(), 1U);
       low_level_param.sampler_ids[0] = *static_cast<const ResourceID *>(data);
       if (effect_ == gapi->current_effect()) {
         gapi->DirtyEffect();
       }
       break;
     }
     default:
       DLOG(ERROR) << "Invalid parameter type.";
       return false;
   }
@@ skipping 206 matching lines @@
       continue;
     const char *name = cgGetParameterName(cg_param);
     if (!name)
       continue;
 
     CGtype cg_type = cgGetParameterType(cg_param);
 
     int num_elements;
     if (cg_type == CG_ARRAY) {
       num_elements = cgGetArraySize(cg_param, 0);
-      // Substitute the first element's type for our type.      
+      // Substitute the first element's type for our type.
       cg_type = cgGetParameterType(cgGetArrayParameter(cg_param, 0));
     } else {
       num_elements = 0;
     }
 
     int index = GetLowLevelParamIndexByName(name);
     if (index < 0) {
       LowLevelParam param;
       param.name = name;
       param.vp_param = NULL;
@@ skipping 381 matching lines @@
   DCHECK(validate_effect_);
   DCHECK(!current_effect_);
   current_effect_ = effects_.Get(current_effect_id_);
   if (!current_effect_) return false;
   validate_effect_ = false;
   return current_effect_->Begin(this);
 }
 
 }  // namespace command_buffer
 }  // namespace o3d