Mandoline: Add WebGL support

gpu/command_buffer/build_gles2_cmd_buffer.py

Index: gpu/command_buffer/build_gles2_cmd_buffer.py
diff --git a/gpu/command_buffer/build_gles2_cmd_buffer.py b/gpu/command_buffer/build_gles2_cmd_buffer.py
index 902aca01ef122f59a3007247ac804caac991ad21..4af8a39962ce52fd40d000679581be3dab85b221 100755
--- a/gpu/command_buffer/build_gles2_cmd_buffer.py
+++ b/gpu/command_buffer/build_gles2_cmd_buffer.py
@@ -4851,7 +4851,8 @@ TEST_P(%(test_name)s, %(name)sInvalidArgs%(arg_index)d_%(value_index)d) {
                   "occlusion_query_EXT", "CHROMIUM_image",
                   "CHROMIUM_copy_texture",
                   "CHROMIUM_pixel_transfer_buffer_object"]
-    if func.IsCoreGLFunction() or func.GetInfo("extension") in extensions:
+    if func.IsCoreGLFunction() or func.GetInfo("extension") in extensions or \
+       func.GetInfo("extension_flag") == "chromium_framebuffer_multisample":
       f.write("MojoGLES2MakeCurrent(context_);");
       func_return = "gl" + func.original_name + "(" + \
           func.MakeOriginalArgString("") + ");"
@@ -10438,6 +10439,7 @@ class MojoGLES2Impl : public gpu::gles2::GLES2Interface {
 
 #include "base/logging.h"
 #include "third_party/mojo/src/mojo/public/c/gles2/chromium_copy_texture.h"
+#include "third_party/mojo/src/mojo/public/c/gles2/chromium_framebuffer_multisample.h"
 #include "third_party/mojo/src/mojo/public/c/gles2/chromium_image.h"
 #include "third_party/mojo/src/mojo/public/c/gles2/chromium_miscellaneous.h"
 #include "third_party/mojo/src/mojo/public/c/gles2/chromium_pixel_transfer_buffer_object.h"
@@ -10868,7 +10870,8 @@ const size_t GLES2Util::enum_to_string_table_len_ =
     """Provides the GL implementation for mojo for a particular extension"""
     with CWriter(filename) as f:
       for func in self.original_functions:
-        if func.GetInfo("extension") != extension:
+        if func.GetInfo("extension") != extension and \
+           func.GetInfo("extension_flag") != extension:
           continue
         f.write("VISIT_GL_CALL(%s, %s, (%s), (%s))\n" %
                                (func.name, func.return_type,
@@ -11012,6 +11015,9 @@ def main(argv):
   gen.WriteMojoGLCallVisitorForExtension(
       mojo_gles2_prefix + "_chromium_pixel_transfer_buffer_object_autogen.h",
       "CHROMIUM_pixel_transfer_buffer_object")
+  gen.WriteMojoGLCallVisitorForExtension(
+      mojo_gles2_prefix + "_chromium_framebuffer_multisample_autogen.h",
+      "chromium_framebuffer_multisample")
 
   Format(gen.generated_cpp_filenames)