Add GL_EXT_color_buffer_half_float support

gpu/command_buffer/service/test_helper.cc

Index: gpu/command_buffer/service/test_helper.cc
diff --git a/gpu/command_buffer/service/test_helper.cc b/gpu/command_buffer/service/test_helper.cc
index b5fa86451ce6a78e2c0dd4d7430553be87d683c0..dc4e3ac59f7a4e2d4cea75c758988503e3134166 100644
--- a/gpu/command_buffer/service/test_helper.cc
+++ b/gpu/command_buffer/service/test_helper.cc
@@ -638,6 +638,32 @@ void TestHelper::SetupFeatureInfoInitExpectationsWithGLVersion(
           .RetiresOnSaturation();
     }
 
+    if (!enable_es3 && !strstr(extensions, "GL_EXT_color_buffer_half_float")) {
+      EXPECT_CALL(
+          *gl,
+          TexImage2D(GL_TEXTURE_2D, 0, GL_R16F, width, width, 0, GL_RED, _, _))
+          .Times(1)
+          .RetiresOnSaturation();
+      EXPECT_CALL(*gl, CheckFramebufferStatusEXT(GL_FRAMEBUFFER))
+          .Times(1)
+          .RetiresOnSaturation();
+      EXPECT_CALL(
+          *gl,
+          TexImage2D(GL_TEXTURE_2D, 0, GL_RG16F, width, width, 0, GL_RG, _, _))
+          .Times(1)
+          .RetiresOnSaturation();
+      EXPECT_CALL(*gl, CheckFramebufferStatusEXT(GL_FRAMEBUFFER))
+          .Times(1)
+          .RetiresOnSaturation();
+      EXPECT_CALL(*gl,
+                  TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, width, width, 0,
+                             GL_RGBA, _, _))
+          .Times(1)
+          .RetiresOnSaturation();
+      EXPECT_CALL(*gl, CheckFramebufferStatusEXT(GL_FRAMEBUFFER))
+          .Times(1)
+          .RetiresOnSaturation();
+    }
 
     EXPECT_CALL(*gl, DeleteFramebuffersEXT(1, _))
         .Times(1)