WebView: add {set,get}SafeBrowsingEnabled per WebView

android_webview/browser/aw_contents_io_thread_client.h

Index: android_webview/browser/aw_contents_io_thread_client.h
diff --git a/android_webview/browser/aw_contents_io_thread_client.h b/android_webview/browser/aw_contents_io_thread_client.h
index 3eb8ae637ce8d96b840b46eb5f83b2a3e10020f0..09e5f50d212065d1b424916407a8ad7cd39193d5 100644
--- a/android_webview/browser/aw_contents_io_thread_client.h
+++ b/android_webview/browser/aw_contents_io_thread_client.h
@@ -99,6 +99,9 @@ class AwContentsIoThreadClient {
 
   // Retrieve the AcceptThirdPartyCookies setting value of this AwContents.
   virtual bool ShouldAcceptThirdPartyCookies() const = 0;
+
+  // Retrieve the SafeBrowsingEnabled setting value of this AwContents.
+  virtual bool GetSafeBrowsingEnabled() const = 0;
 };
 
 } // namespace android_webview