Adds support for EXT_framebuffer_multisample...

gpu/command_buffer/service/context_group_unittest.cc

Index: gpu/command_buffer/service/context_group_unittest.cc
===================================================================
--- gpu/command_buffer/service/context_group_unittest.cc	(revision 56887)
+++ gpu/command_buffer/service/context_group_unittest.cc	(working copy)
@@ -122,6 +122,7 @@
   EXPECT_TRUE(group_.texture_manager() == NULL);
   EXPECT_TRUE(group_.program_manager() == NULL);
   EXPECT_TRUE(group_.shader_manager() == NULL);
+  EXPECT_FALSE(group_.extension_flags().ext_framebuffer_multisample);
 }
 
 TEST_F(ContextGroupTest, InitializeNoExtensions) {
@@ -286,6 +287,24 @@
   EXPECT_TRUE(group_.validators()->pixel_type.IsValid(GL_HALF_FLOAT_OES));
 }
 
+TEST_F(ContextGroupTest, InitializeEXT_framebuffer_multisample) {
+  SetupInitExpectations("GL_EXT_framebuffer_multisample");
+  group_.Initialize();
+  EXPECT_TRUE(group_.extension_flags().ext_framebuffer_multisample);
+  EXPECT_THAT(group_.extensions(), HasSubstr("GL_EXT_framebuffer_multisample"));
+  EXPECT_THAT(group_.extensions(), HasSubstr("GL_EXT_framebuffer_blit"));
+  EXPECT_TRUE(group_.validators()->frame_buffer_target.IsValid(
+      GL_READ_FRAMEBUFFER_EXT));
+  EXPECT_TRUE(group_.validators()->frame_buffer_target.IsValid(
+      GL_DRAW_FRAMEBUFFER_EXT));
+  EXPECT_TRUE(group_.validators()->g_l_state.IsValid(
+      GL_READ_FRAMEBUFFER_BINDING_EXT));
+  EXPECT_TRUE(group_.validators()->g_l_state.IsValid(
+      GL_DRAW_FRAMEBUFFER_BINDING_EXT));
+  EXPECT_TRUE(group_.validators()->render_buffer_parameter.IsValid(
+      GL_MAX_SAMPLES_EXT));
+}
+
 }  // namespace gles2
 }  // namespace gpu