Add GL_CHROMIUM_screen_space_antialiasing to support alternative AA

ui/gl/gl_bindings_autogen_gl.cc

Index: ui/gl/gl_bindings_autogen_gl.cc
diff --git a/ui/gl/gl_bindings_autogen_gl.cc b/ui/gl/gl_bindings_autogen_gl.cc
index c2493db892feb9a76e8314a3efbb9a06bfe0e0db..2917d993b9680bd9362a4032d7fb3a1218dba030 100644
--- a/ui/gl/gl_bindings_autogen_gl.cc
+++ b/ui/gl/gl_bindings_autogen_gl.cc
@@ -26,6 +26,7 @@ DriverGL g_driver_gl;
 void DriverGL::InitializeStaticBindings() {
   fn.glActiveTextureFn = reinterpret_cast<glActiveTextureProc>(
       GetGLProcAddress("glActiveTexture"));
+  fn.glApplyFramebufferAttachmentCMAAINTELFn = 0;
   fn.glAttachShaderFn =
       reinterpret_cast<glAttachShaderProc>(GetGLProcAddress("glAttachShader"));
   fn.glBeginQueryFn = 0;
@@ -528,6 +529,8 @@ void DriverGL::InitializeDynamicBindings(GLContext* context) {
   ext.b_GL_IMG_multisampled_render_to_texture =
       extensions.find("GL_IMG_multisampled_render_to_texture ") !=
       std::string::npos;
+  ext.b_GL_INTEL_framebuffer_CMAA =
+      extensions.find("GL_INTEL_framebuffer_CMAA ") != std::string::npos;
   ext.b_GL_KHR_blend_equation_advanced =
       extensions.find("GL_KHR_blend_equation_advanced ") != std::string::npos;
   ext.b_GL_KHR_robustness =
@@ -546,6 +549,14 @@ void DriverGL::InitializeDynamicBindings(GLContext* context) {
   ext.b_GL_OES_vertex_array_object =
       extensions.find("GL_OES_vertex_array_object ") != std::string::npos;
 
+  debug_fn.glApplyFramebufferAttachmentCMAAINTELFn = 0;
+  if (ext.b_GL_INTEL_framebuffer_CMAA) {
+    fn.glApplyFramebufferAttachmentCMAAINTELFn =
+        reinterpret_cast<glApplyFramebufferAttachmentCMAAINTELProc>(
+            GetGLProcAddress("glApplyFramebufferAttachmentCMAAINTEL"));
+    DCHECK(fn.glApplyFramebufferAttachmentCMAAINTELFn);
+  }
+
   debug_fn.glBeginQueryFn = 0;
   if (!ver->is_es || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glBeginQueryFn =
@@ -2120,6 +2131,13 @@ static void GL_BINDING_CALL Debug_glActiveTexture(GLenum texture) {
   g_driver_gl.debug_fn.glActiveTextureFn(texture);
 }
 
+static void GL_BINDING_CALL Debug_glApplyFramebufferAttachmentCMAAINTEL(void) {
+  GL_SERVICE_LOG("glApplyFramebufferAttachmentCMAAINTEL"
+                 << "("
+                 << ")");
+  g_driver_gl.debug_fn.glApplyFramebufferAttachmentCMAAINTELFn();
+}
+
 static void GL_BINDING_CALL Debug_glAttachShader(GLuint program,
                                                  GLuint shader) {
   GL_SERVICE_LOG("glAttachShader"
@@ -5022,6 +5040,12 @@ void DriverGL::InitializeDebugBindings() {
     debug_fn.glActiveTextureFn = fn.glActiveTextureFn;
     fn.glActiveTextureFn = Debug_glActiveTexture;
   }
+  if (!debug_fn.glApplyFramebufferAttachmentCMAAINTELFn) {
+    debug_fn.glApplyFramebufferAttachmentCMAAINTELFn =
+        fn.glApplyFramebufferAttachmentCMAAINTELFn;
+    fn.glApplyFramebufferAttachmentCMAAINTELFn =
+        Debug_glApplyFramebufferAttachmentCMAAINTEL;
+  }
   if (!debug_fn.glAttachShaderFn) {
     debug_fn.glAttachShaderFn = fn.glAttachShaderFn;
     fn.glAttachShaderFn = Debug_glAttachShader;
@@ -6252,6 +6276,10 @@ void GLApiBase::glActiveTextureFn(GLenum texture) {
   driver_->fn.glActiveTextureFn(texture);
 }
 
+void GLApiBase::glApplyFramebufferAttachmentCMAAINTELFn(void) {
+  driver_->fn.glApplyFramebufferAttachmentCMAAINTELFn();
+}
+
 void GLApiBase::glAttachShaderFn(GLuint program, GLuint shader) {
   driver_->fn.glAttachShaderFn(program, shader);
 }
@@ -7989,6 +8017,12 @@ void TraceGLApi::glActiveTextureFn(GLenum texture) {
   gl_api_->glActiveTextureFn(texture);
 }
 
+void TraceGLApi::glApplyFramebufferAttachmentCMAAINTELFn(void) {
+  TRACE_EVENT_BINARY_EFFICIENT0(
+      "gpu", "TraceGLAPI::glApplyFramebufferAttachmentCMAAINTEL")
+  gl_api_->glApplyFramebufferAttachmentCMAAINTELFn();
+}
+
 void TraceGLApi::glAttachShaderFn(GLuint program, GLuint shader) {
   TRACE_EVENT_BINARY_EFFICIENT0("gpu", "TraceGLAPI::glAttachShader")
   gl_api_->glAttachShaderFn(program, shader);
@@ -10049,6 +10083,13 @@ void NoContextGLApi::glActiveTextureFn(GLenum texture) {
   LOG(ERROR) << "Trying to call glActiveTexture() without current GL context";
 }
 
+void NoContextGLApi::glApplyFramebufferAttachmentCMAAINTELFn(void) {
+  NOTREACHED() << "Trying to call glApplyFramebufferAttachmentCMAAINTEL() "
+                  "without current GL context";
+  LOG(ERROR) << "Trying to call glApplyFramebufferAttachmentCMAAINTEL() "
+                "without current GL context";
+}
+
 void NoContextGLApi::glAttachShaderFn(GLuint program, GLuint shader) {
   NOTREACHED() << "Trying to call glAttachShader() without current GL context";
   LOG(ERROR) << "Trying to call glAttachShader() without current GL context";