Fixed some warnings.

command_buffer/service/cross/gl/texture_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 191 matching lines @@
   glDeleteTextures(1, &gl_texture_);
   CHECK_GL_ERROR();
 }
 
 Texture2DGL *Texture2DGL::Create(unsigned int width,
                                  unsigned int height,
                                  unsigned int levels,
                                  texture::Format format,
                                  unsigned int flags,
                                  bool enable_render_surfaces) {
-  DCHECK_GT(width, 0);
-  DCHECK_GT(height, 0);
-  DCHECK_GT(levels, 0);
+  DCHECK_GT(width, 0U);
+  DCHECK_GT(height, 0U);
+  DCHECK_GT(levels, 0U);
   GLenum gl_internal_format = 0;
   GLenum gl_format = 0;
   GLenum gl_type = 0;
   bool r = GetGLFormatType(format, &gl_internal_format, &gl_format, &gl_type);
   DCHECK(r);  // Was checked in the decoder.
   GLuint gl_texture = 0;
   glGenTextures(1, &gl_texture);
   glBindTexture(GL_TEXTURE_2D, gl_texture);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, levels - 1);
   // glCompressedTexImage2D does't accept NULL as a parameter, so we need
@@ skipping 115 matching lines @@
   return true;
 }
 
 Texture3DGL *Texture3DGL::Create(unsigned int width,
                                  unsigned int height,
                                  unsigned int depth,
                                  unsigned int levels,
                                  texture::Format format,
                                  unsigned int flags,
                                  bool enable_render_surfaces) {
-  DCHECK_GT(width, 0);
-  DCHECK_GT(height, 0);
-  DCHECK_GT(depth, 0);
-  DCHECK_GT(levels, 0);
+  DCHECK_GT(width, 0U);
+  DCHECK_GT(height, 0U);
+  DCHECK_GT(depth, 0U);
+  DCHECK_GT(levels, 0U);
   GLenum gl_internal_format = 0;
   GLenum gl_format = 0;
   GLenum gl_type = 0;
   bool r = GetGLFormatType(format, &gl_internal_format, &gl_format, &gl_type);
   DCHECK(r);  // Was checked in the decoder.
   GLuint gl_texture = 0;
   glGenTextures(1, &gl_texture);
   glBindTexture(GL_TEXTURE_3D, gl_texture);
   glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, levels - 1);
   // glCompressedTexImage3D does't accept NULL as a parameter, so we need
@@ skipping 103 matching lines @@
 bool Texture3DGL::InstallFrameBufferObjects(
     RenderSurfaceGL *gl_surface) {
   return false;
 }
 
 TextureCubeGL *TextureCubeGL::Create(unsigned int side,
                                      unsigned int levels,
                                      texture::Format format,
                                      unsigned int flags,
                                      bool enable_render_surfaces) {
-  DCHECK_GT(side, 0);
-  DCHECK_GT(levels, 0);
+  DCHECK_GT(side, 0U);
+  DCHECK_GT(levels, 0U);
   GLenum gl_internal_format = 0;
   GLenum gl_format = 0;
   GLenum gl_type = 0;
   bool r = GetGLFormatType(format, &gl_internal_format, &gl_format, &gl_type);
   DCHECK(r);  // Was checked in the decoder.
   GLuint gl_texture = 0;
   glGenTextures(1, &gl_texture);
   glBindTexture(GL_TEXTURE_CUBE_MAP, gl_texture);
   glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_MAX_LEVEL,
                   levels-1);
@@ skipping 251 matching lines @@
   // sampler parameters.
   DirtyEffect();
   return texture->GetData(volume, level, face, row_pitch, slice_pitch,
                           size, data) ?
       BufferSyncInterface::kParseNoError :
       BufferSyncInterface::kParseInvalidArguments;
 }
 
 }  // namespace command_buffer
 }  // namespace o3d