Add operator==(const GURL&, const StringPiece&) to gurl.h

components/power/origin_power_map_unittest.cc

Index: components/power/origin_power_map_unittest.cc
diff --git a/components/power/origin_power_map_unittest.cc b/components/power/origin_power_map_unittest.cc
index 15899682b000a11fa0763ade0ec87ac219aa8416..061f9bdd2f23f420b68456bc2f0219338a41a3d6 100644
--- a/components/power/origin_power_map_unittest.cc
+++ b/components/power/origin_power_map_unittest.cc
@@ -97,8 +97,8 @@ TEST(OriginPowerMapTest, ClearOriginMap) {
   EXPECT_DOUBLE_EQ(10, origin_power_map.GetPowerForOrigin(url5));
 
   // Delete |url1|.
-  origin_power_map.ClearOriginMap(
-      base::Bind(&GURL::operator==, base::Unretained(&url1)));
+  origin_power_map.ClearOriginMap(base::Bind(
+      static_cast<bool (*)(const GURL&, const GURL&)>(operator==), url1));
   EXPECT_DOUBLE_EQ(0, origin_power_map.GetPowerForOrigin(url1));
   EXPECT_DOUBLE_EQ(40, origin_power_map.GetPowerForOrigin(url2));
   EXPECT_DOUBLE_EQ(30, origin_power_map.GetPowerForOrigin(url3));