Make most of VirtualGL auto-generated

I'm not sure if this is the best way

GLApi is a pure virtual interface

GLApiBase is a class that calls driver->fnGLfunction
so it can be shared with RealGLApi and VirtualGLApi

RealGLApi is basically has nothing currenlty. It's just
GLApiBase but I guess the point is you can override something
if you need to

VirtualGLApi can now override just what it needs to so adding
new functions to generate_bindings.py no longer needs manual
editing

BUG=none
R=apatrick@chromium.org


Review URL: https://chromiumcodereview.appspot.com/11565005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@173364 0039d316-1c4b-4281-b951-d872f2087c98

ui/gl/generate_bindings.py

@@ -1484,7 +1484,7 @@ def GenerateSource(file, functions, set_name, used_extension_functions):
     return_type = func['return_type']
     arguments = func['arguments']
     file.write('\n')
-    file.write('%s Real%sApi::%sFn(%s) {\n' %
+    file.write('%s %sApiBase::%sFn(%s) {\n' %
         (return_type, set_name.upper(), names[0], arguments))
     argument_names = re.sub(
         r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', arguments)

ui/gl/gl_egl_api_implementation.cc

@@ -40,14 +40,25 @@ EGLApi::EGLApi() {
 EGLApi::~EGLApi() {
 }
 
+EGLApiBase::EGLApiBase()
+    : driver_(NULL) {
+}
+
+EGLApiBase::~EGLApiBase() {
+}
+
+void EGLApiBase::InitializeBase(DriverEGL* driver) {
+  driver_ = driver;
+}
+
 RealEGLApi::RealEGLApi() {
 }
 
 RealEGLApi::~RealEGLApi() {
 }
 
 void RealEGLApi::Initialize(DriverEGL* driver) {
-  driver_ = driver;
+  InitializeBase(driver);
 }
 
 }  // namespace gfx

ui/gl/gl_egl_api_implementation.h

@@ -18,21 +18,28 @@ void InitializeGLExtensionBindingsEGL(GLContext* context);
 void InitializeDebugGLBindingsEGL();
 void ClearGLBindingsEGL();
 
-class GL_EXPORT RealEGLApi : public EGLApi {
+class GL_EXPORT EGLApiBase : public EGLApi {
  public:
-  RealEGLApi();
-  virtual ~RealEGLApi();
-  void Initialize(DriverEGL* driver);
-
   // 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_egl.h"
 
- private:
+ protected:
+  EGLApiBase();
+  virtual ~EGLApiBase();
+  void InitializeBase(DriverEGL* driver);
+
   DriverEGL* driver_;
 };
 
+class GL_EXPORT RealEGLApi : public EGLApiBase {
+ public:
+  RealEGLApi();
+  virtual ~RealEGLApi();
+  void Initialize(DriverEGL* driver);
+};
+
 }  // namespace gfx
 
 #endif  // UI_GL_EGL_API_IMPLEMENTATION_H_