gpu: Add disable_blend_equation_advanced workaround for Adreno 4xx.

gpu/command_buffer/service/feature_info_unittest.cc

Index: gpu/command_buffer/service/feature_info_unittest.cc
diff --git a/gpu/command_buffer/service/feature_info_unittest.cc b/gpu/command_buffer/service/feature_info_unittest.cc
index bbef693aff9be7f067980e695a4bec9ff6a35457..7fc5c4fc53a66b6643fc019b2a4c07dce83d90c1 100644
--- a/gpu/command_buffer/service/feature_info_unittest.cc
+++ b/gpu/command_buffer/service/feature_info_unittest.cc
@@ -1183,6 +1183,18 @@ TEST_P(FeatureInfoTest, ARBSyncDisabled) {
   EXPECT_FALSE(gfx::GLFence::IsSupported());
 }
 
+TEST_P(FeatureInfoTest, BlendEquationAdvancedDisabled) {
+  base::CommandLine command_line(0, NULL);
+  command_line.AppendSwitchASCII(
+      switches::kGpuDriverBugWorkarounds,
+      base::IntToString(gpu::DISABLE_BLEND_EQUATION_ADVANCED));
+  SetupInitExpectationsWithCommandLine(
+      "GL_KHR_blend_equation_advanced_coherent GL_KHR_blend_equation_advanced",
+      command_line);
+  EXPECT_FALSE(info_->feature_flags().blend_equation_advanced);
+  EXPECT_FALSE(info_->feature_flags().blend_equation_advanced_coherent);
+}
+
 TEST_P(FeatureInfoTest, InitializeCHROMIUM_path_rendering) {
   SetupInitExpectationsWithGLVersion(
       "GL_ARB_compatibility GL_NV_path_rendering GL_EXT_direct_state_access",