Fix getInternalformativ on GL 4.1 or lower.

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 <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 16311 matching lines @@
   }
   if (!validators_->internal_format_parameter.IsValid(pname)) {
     LOCAL_SET_GL_ERROR_INVALID_ENUM("glGetInternalformativ", pname, "pname");
     return error::kNoError;
   }
 
   typedef cmds::GetInternalformativ::Result Result;
   GLsizei num_values = 0;
   std::vector<GLint> samples;
   if (gl_version_info().IsLowerThanGL(4, 2)) {
-    if (!GLES2Util::IsIntegerFormat(format) &&
-        !GLES2Util::IsFloatFormat(format)) {
-      // No multisampling for integer formats and float formats.
+    if (!GLES2Util::IsIntegerFormat(format)) {
+      // No multisampling for integer formats.
       GLint max_samples = renderbuffer_manager()->max_samples();
       while (max_samples > 0) {
         samples.push_back(max_samples);
-        max_samples = max_samples >> 1;
+        --max_samples;
       }
     }
     switch (pname) {
       case GL_NUM_SAMPLE_COUNTS:
         num_values = 1;
         break;
       case GL_SAMPLES:
         num_values = static_cast<GLsizei>(samples.size());
         break;
       default:
@@ skipping 1345 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 "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu