[content] Fix background color update handling in RWHVAura.

content/browser/renderer_host/render_widget_host_unittest.cc

Index: content/browser/renderer_host/render_widget_host_unittest.cc
diff --git a/content/browser/renderer_host/render_widget_host_unittest.cc b/content/browser/renderer_host/render_widget_host_unittest.cc
index 972f34021b3a5ddaaa670a1a445ef43646e6fb07..1aa6dd94fb4256a4152f5f1e274ebc58c2e3ecc1 100644
--- a/content/browser/renderer_host/render_widget_host_unittest.cc
+++ b/content/browser/renderer_host/render_widget_host_unittest.cc
@@ -887,9 +887,11 @@ TEST_F(RenderWidgetHostTest, Background) {
 #endif
   host_->SetView(view.get());
 
-  EXPECT_TRUE(view->GetBackgroundOpaque());
+  EXPECT_EQ(static_cast<unsigned>(SK_AlphaOPAQUE),
+            SkColorGetA(view->background_color()));
   view->SetBackgroundColor(SK_ColorTRANSPARENT);
-  EXPECT_FALSE(view->GetBackgroundOpaque());
+  EXPECT_EQ(static_cast<unsigned>(SK_AlphaTRANSPARENT),

[danakj, 2017/02/28 17:52:31]

You could just EXPECT_EQ(SK_ColorTRANSPARENT, view->background_color()).

And maybe EXPECT_NE it above, is simpler.

[Eric Seckler, 2017/03/01 10:22:09]

Done.

+            SkColorGetA(view->background_color()));
 
   const IPC::Message* set_background =
       process_->sink().GetUniqueMessageMatching(