Move code in ui/gl/* from gfx:: to gl::

ui/gl/gl_helper.h

 // Copyright 2015 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_HELPER_H_
 #define UI_GL_GL_HELPER_H_
 
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_export.h"
 
-namespace gfx {
+namespace gl {
 
 class GL_EXPORT GLHelper {
  public:
   // Compiles a shader.
   // Does not check for errors, always returns shader.
   static GLuint CompileShader(GLenum type, const char* src);
 
   // Compiles a shader and checks for compilation errors.
   // Returns shader, 0 on failure.
   static GLuint LoadShader(GLenum type, const char* src);
 
   // Attaches 2 shaders and links them to a program.
   // Does not check for errors, always returns program.
   static GLuint LinkProgram(GLuint vertex_shader, GLuint fragment_shader);
 
   // Attaches 2 shaders, links them to a program, and checks for errors.
   // Returns program, 0 on failure.
   static GLuint SetupProgram(GLuint vertex_shader, GLuint fragment_shader);
 
   // Sets up a vertex buffer containing 4 vertices that can be used to draw
   // a quad as a tri-strip.
   static GLuint SetupQuadVertexBuffer();
 
   // Draws a quad to the currently bound frame buffer.
   static void DrawQuad(GLuint vertex_buffer);
 };
 
-}  // namespace gfx
+}  // namespace gl
 
 #endif  // UI_GL_GL_HELPER_H_