[WebView] Remove more redundant classes

android_webview/browser/aw_web_preferences_populater.cc

Index: android_webview/browser/aw_web_preferences_populater.cc
diff --git a/android_webview/browser/aw_web_preferences_populater.cc b/android_webview/browser/aw_web_preferences_populater.cc
index 008cf5cb761f2e6b7e5e1cb0be6359e24546fe7c..3d4fb147c39b4a676ee17603f37c80d46166b315 100644
--- a/android_webview/browser/aw_web_preferences_populater.cc
+++ b/android_webview/browser/aw_web_preferences_populater.cc
@@ -3,9 +3,17 @@
 // found in the LICENSE file.
 
 #include "android_webview/browser/aw_web_preferences_populater.h"
+#include "android_webview/browser/aw_settings.h"
 
 namespace android_webview {
 
-AwWebPreferencesPopulater::~AwWebPreferencesPopulater() {}
+void AwWebPreferencesPopulater::PopulateFor(

[boliu, 2017/05/17 16:18:11]

you can remove this class entirely and just inline body of this method in
aw_content_browser_client.cc

+    content::WebContents* web_contents,
+    content::WebPreferences* web_prefs) {
+  AwSettings* aw_settings = AwSettings::FromWebContents(web_contents);
+  if (aw_settings) {
+    aw_settings->PopulateWebPreferences(web_prefs);
+  }
+}
 
 }  // namespace android_webview