Implement support for rendering to 32-bit float textures on ES3

ui/gl/gl_version_info.h

 // Copyright 2014 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.
 
 #ifndef UI_GL_GL_VERSION_INFO_H_
 #define UI_GL_GL_VERSION_INFO_H_
 
 #include <string>
 #include "base/basictypes.h"
 
 namespace gfx {
 
 struct GLVersionInfo {
-  explicit GLVersionInfo(const char* version_str);
+  GLVersionInfo(const char* version_str, const char* renderer_str);
 
   // New flags, such as is_gl4_4 could be introduced as needed.
   // For now, this level of granularity is enough.
   bool is_es;
   bool is_es1;
   bool is_es2;
   bool is_es3;
 
   bool is_gl1;
   bool is_gl2;
   bool is_gl3;
   bool is_gl4;
 
+  bool is_angle;
+
 private:
   DISALLOW_COPY_AND_ASSIGN(GLVersionInfo);
 };
 
 }  // namespace gfx
 
 #endif // UI_GL_GL_VERSION_INFO_H_