Fixes for OpenGL loader generator.

Add extensions to the appropriate (desktop or ES) LoadProc generation.
Extensions have no removed_procs, so don't check for them.

Bug: chromium:1205155
Change-Id: I705ef3fb700318f59fdbc6415fcf3909c62e39f4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/50180
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Stephen White <senorblanco@chromium.org>

generator/opengl_loader_generator.py

@@ -166,8 +166,7 @@ def compute_params(root, supported_extensions):
         for command in section.findall('./require/command'):
             proc_name = command.attrib['name']
             assert all_procs[proc_name].alias == None
-            if proc_name not in removed_procs:
+            section_procs.append(all_procs[proc_name])
-                section_procs.append(all_procs[proc_name])
 
         section_enums = []
         for enum in section.findall('./require/enum'):

generator/templates/opengl/OpenGLFunctionsBase.cpp

@@ -35,6 +35,14 @@ MaybeError OpenGLFunctionsBase::LoadOpenGLESProcs(GetProcAddress getProc, int ma
         }
 
     {% endfor %}
+
+    {% for block in extension_gles_blocks %}
+        // {{block.extension}}
+        {% for proc in block.procs %}
+            DAWN_TRY(LoadProc(getProc, &{{proc.ProcName()}}, "{{proc.glProcName()}}"));
+        {% endfor %}
+    {% endfor %}
+
     return {};
 }
 
@@ -48,6 +56,14 @@ MaybeError OpenGLFunctionsBase::LoadDesktopGLProcs(GetProcAddress getProc, int m
         }
 
     {% endfor %}
+
+    {% for block in extension_desktop_gl_blocks %}
+        // {{block.extension}}
+        {% for proc in block.procs %}
+            DAWN_TRY(LoadProc(getProc, &{{proc.ProcName()}}, "{{proc.glProcName()}}"));
+        {% endfor %}
+    {% endfor %}
+
     return {};
 }