[WebView] initial webview-side implementation of safebrowsing

android_webview/native/aw_contents.h

Index: android_webview/native/aw_contents.h
diff --git a/android_webview/native/aw_contents.h b/android_webview/native/aw_contents.h
index 2afa105daac08909f9457c28ae9279d7d066491f..a51c450d3e9cb867cb2da62d19c99e4561bc922c 100644
--- a/android_webview/native/aw_contents.h
+++ b/android_webview/native/aw_contents.h
@@ -13,6 +13,7 @@
 #include <utility>
 
 #include "android_webview/browser/aw_browser_permission_request_delegate.h"
+#include "android_webview/browser/aw_safe_browsing_ui_manager.h"
 #include "android_webview/browser/browser_view_renderer.h"
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/find_helper.h"
@@ -63,7 +64,8 @@ class AwContents : public FindHelper::Listener,
                    public BrowserViewRendererClient,
                    public PermissionRequestHandlerClient,
                    public AwBrowserPermissionRequestDelegate,
-                   public content::WebContentsObserver {
+                   public content::WebContentsObserver,
+                   public AwSafeBrowsingUIManager::UIManagerClient {
  public:
   // Returns the AwContents instance associated with |web_contents|, or NULL.
   static AwContents* FromWebContents(content::WebContents* web_contents);
@@ -339,6 +341,9 @@ class AwContents : public FindHelper::Listener,
   void DidAttachInterstitialPage() override;
   void DidDetachInterstitialPage() override;
 
+  // AwSafeBrowsingUIManager::UIManagerClient implementation
+  bool CanShowInterstitial() override;
+
  private:
   void InitAutofillIfNecessary(bool enabled);