gpu: Make the log of texture binding failure more specific.

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 6409 matching lines @@
         TextureUnit& texture_unit = state_.texture_units[texture_unit_index];
         TextureRef* texture_ref =
             texture_unit.GetInfoForSamplerType(uniform_info->type).get();
         GLenum textarget = GetBindTargetForSamplerType(uniform_info->type);
         if (!texture_ref || !texture_manager()->CanRender(texture_ref)) {
           textures_set = true;
           glActiveTexture(GL_TEXTURE0 + texture_unit_index);
           glBindTexture(
               textarget,
               texture_manager()->black_texture_id(uniform_info->type));
-          LOCAL_RENDER_WARNING(
-              std::string("texture bound to texture unit ") +
-              base::IntToString(texture_unit_index) +
-              " is not renderable. It maybe non-power-of-2 and have"
-              " incompatible texture filtering or is not"
-              " 'texture complete'");
+          if (!texture_ref) {
+            LOCAL_RENDER_WARNING(
+                std::string("there is no texture bound to the unit ") +
+                base::IntToString(texture_unit_index));
+          } else {
+            LOCAL_RENDER_WARNING(
+                std::string("texture bound to texture unit ") +
+                base::IntToString(texture_unit_index) +
+                " is not renderable. It maybe non-power-of-2 and have"
+                " incompatible texture filtering.");
+          }
           continue;
         }
 
         if (textarget != GL_TEXTURE_CUBE_MAP) {
           Texture* texture = texture_ref->texture();
           gfx::GLImage* image = texture->GetLevelImage(textarget, 0);
           if (image && !texture->IsAttachedToFramebuffer()) {
             ScopedGLErrorSuppressor suppressor(
                 "GLES2DecoderImpl::PrepareTexturesForRender", GetErrorState());
             textures_set = true;
@@ skipping 5189 matching lines @@
   }
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu