Refactor GL bindings so there is no global GLApi or DriverGL.

ui/gl/gl_gl_api_implementation.h

 // 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.
 
 #ifndef UI_GL_GL_GL_API_IMPLEMENTATION_H_
 #define UI_GL_GL_GL_API_IMPLEMENTATION_H_
 
+#include <memory>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_export.h"
 
 namespace base {
 class CommandLine;
 }
 
 namespace gl {
 
-class GLContext;
 struct GLVersionInfo;
 
 GL_EXPORT void InitializeStaticGLBindingsGL();
-void InitializeDynamicGLBindingsGL(GLContext* context);
+GL_EXPORT void ClearBindingsGL();
+
 GL_EXPORT void InitializeDebugGLBindingsGL();
-void InitializeNullDrawGLBindingsGL();
-// TODO(danakj): Remove this when all test suites are using null-draw.
-bool HasInitializedNullDrawGLBindingsGL();
-bool SetNullDrawGLBindingsEnabledGL(bool enabled);
-GL_EXPORT void ClearBindingsGL();
-void SetGLToRealGLApi();
-void SetGLToStubGLApi();
-void SetGLApi(GLApi* api);
-void SetGLApiToNoContext();
-GLApi* GetCurrentGLApi();
-GL_EXPORT void SetStubGLApi(GLApi* api);
-const GLVersionInfo* GetGLVersionInfo();
+bool GetDebugGLBindingsInitializedGL();
+
+bool SetNullDrawGLBindingsEnabled(bool enabled);
+bool GetNullDrawBindingsEnabled();
+
+void SetCurrentGL(CurrentGL* current);
 
 class GL_EXPORT GLApiBase : public GLApi {
  public:
   // Include the auto-generated part of this class. 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 "gl_bindings_api_autogen_gl.h"
 
  protected:
   GLApiBase();
   ~GLApiBase() override;
   void InitializeBase(DriverGL* driver);
 
   DriverGL* driver_;
 };
 
 // Implemenents the GL API by calling directly into the driver.
 class GL_EXPORT RealGLApi : public GLApiBase {
  public:
   RealGLApi();
   ~RealGLApi() override;
   void Initialize(DriverGL* driver);
   void InitializeWithCommandLine(DriverGL* driver,
                                  base::CommandLine* command_line);
 
   void glGetIntegervFn(GLenum pname, GLint* params) override;
   const GLubyte* glGetStringFn(GLenum name) override;
   const GLubyte* glGetStringiFn(GLenum name, GLuint index) override;
 
+  void glTexImage2DFn(GLenum target,
+                      GLint level,
+                      GLint internalformat,
+                      GLsizei width,
+                      GLsizei height,
+                      GLint border,
+                      GLenum format,
+                      GLenum type,
+                      const void* pixels) override;
+
+  void glTexSubImage2DFn(GLenum target,
+                         GLint level,
+                         GLint xoffset,
+                         GLint yoffset,
+                         GLsizei width,
+                         GLsizei height,
+                         GLenum format,
+                         GLenum type,
+                         const void* pixels) override;
+
+  void glTexStorage2DEXTFn(GLenum target,
+                           GLsizei levels,
+                           GLenum internalformat,
+                           GLsizei width,
+                           GLsizei height) override;
+
+  void glRenderbufferStorageEXTFn(GLenum target,
+                                  GLenum internalformat,
+                                  GLsizei width,
+                                  GLsizei height) override;
+
+  void glRenderbufferStorageMultisampleEXTFn(GLenum target,
+                                             GLsizei samples,
+                                             GLenum internalformat,
+                                             GLsizei width,
+                                             GLsizei height) override;
+
+  void glRenderbufferStorageMultisampleFn(GLenum target,
+                                          GLsizei samples,
+                                          GLenum internalformat,
+                                          GLsizei width,
+                                          GLsizei height) override;
+
+  void glClearFn(GLbitfield mask) override;
+  void glDrawArraysFn(GLenum mode, GLint first, GLsizei count) override;
+  void glDrawElementsFn(GLenum mode,
+                        GLsizei count,
+                        GLenum type,
+                        const void* indices) override;
+
+  void glClearDepthFn(GLclampd depth) override;
+  void glDepthRangeFn(GLclampd z_near, GLclampd z_far) override;
+
   void InitializeFilteredExtensions();
+  void set_version(std::unique_ptr<GLVersionInfo> version);
 
  private:
   // Filtered GL_EXTENSIONS we return to glGetString(i) calls.
   std::vector<std::string> disabled_exts_;
   std::vector<std::string> filtered_exts_;
   std::string filtered_exts_str_;
 
+  std::unique_ptr<GLVersionInfo> version_;
+
 #if DCHECK_IS_ON()
   bool filtered_exts_initialized_;
 #endif
 };
 
 // Inserts a TRACE for every GL call.
 class TraceGLApi : public GLApi {
  public:
   TraceGLApi(GLApi* gl_api) : gl_api_(gl_api) { }
   ~TraceGLApi() override;
 
   // Include the auto-generated part of this class. 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 "gl_bindings_api_autogen_gl.h"
 
  private:
   GLApi* gl_api_;
 };
 
+// Logs debug information for every GL call.
+class DebugGLApi : public GLApi {
+ public:
+  DebugGLApi(GLApi* gl_api);
+  ~DebugGLApi() override;
+
+  // Include the auto-generated part of this class. 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 "gl_bindings_api_autogen_gl.h"
+
+ private:
+  GLApi* gl_api_;
+};
+
 // Catches incorrect usage when GL calls are made without a current context.
 class NoContextGLApi : public GLApi {
  public:
   NoContextGLApi();
   ~NoContextGLApi() override;
 
   // Include the auto-generated part of this class. 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 "gl_bindings_api_autogen_gl.h"
 };
 
 }  // namespace gl
 
 #endif  // UI_GL_GL_GL_API_IMPLEMENTATION_H_