Mac: Some clang appeasing.

gpu/command_buffer/service/program_manager.cc

 // Copyright (c) 2010 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.
 
 #include "gpu/command_buffer/service/program_manager.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 186 matching lines @@
 }
 
 const ProgramManager::ProgramInfo::UniformInfo*
     ProgramManager::ProgramInfo::AddUniformInfo(
         GLsizei size, GLenum type, GLint location, const std::string& name) {
   const char* kArraySpec = "[0]";
   uniform_infos_.push_back(UniformInfo(size, type, name));
   UniformInfo& info = uniform_infos_.back();
   info.element_locations.resize(size);
   info.element_locations[0] = location;
-  size_t num_texture_units = info.IsSampler() ? size : 0u;
+  DCHECK_GE(size, 0);
+  size_t num_texture_units = info.IsSampler() ? static_cast<size_t>(size) : 0u;
   info.texture_units.clear();
   info.texture_units.resize(num_texture_units, 0);
 
   if (size > 1) {
     // Sadly there is no way to tell if this is an array except if the name
     // has an array string or the size > 1. That means an array of size 1 can
     // be ambiguous.
     //
     // For now we just make sure that if the size is > 1 then the name must have
     // an array spec.
@@ skipping 144 matching lines @@
       return true;
     }
   }
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu