[WebView] Add WebView platform to Finch's study.proto

components/variations/study_filtering_unittest.cc

Index: components/variations/study_filtering_unittest.cc
diff --git a/components/variations/study_filtering_unittest.cc b/components/variations/study_filtering_unittest.cc
index 7572118a5614fc638dcc04f146d31d59f81b6d0d..1d70c48c8cf04ef5f78ca8781f783a95dfb375c6 100644
--- a/components/variations/study_filtering_unittest.cc
+++ b/components/variations/study_filtering_unittest.cc
@@ -212,8 +212,10 @@ TEST(VariationsStudyFilteringTest, CheckStudyLocale) {
 
 TEST(VariationsStudyFilteringTest, CheckStudyPlatform) {
   const Study::Platform platforms[] = {
-      Study::PLATFORM_WINDOWS,  Study::PLATFORM_MAC,     Study::PLATFORM_LINUX,
-      Study::PLATFORM_CHROMEOS, Study::PLATFORM_ANDROID, Study::PLATFORM_IOS,
+      Study::PLATFORM_WINDOWS,         Study::PLATFORM_MAC,
+      Study::PLATFORM_LINUX,           Study::PLATFORM_CHROMEOS,
+      Study::PLATFORM_ANDROID,         Study::PLATFORM_IOS,
+      Study::PLATFORM_ANDROID_WEBVIEW,
   };
   ASSERT_EQ(Study::Platform_ARRAYSIZE, static_cast<int>(arraysize(platforms)));
   bool platform_added[arraysize(platforms)] = { 0 };