permissionrequest API for guest Download.

Exposed event:
event.type = 'download'
event.requestMethod = 'GET'/'POST'...
event.url = url


BUG=141204
TEST=Pending: osx + win (b/c there is a *ViewGuest change).
Added browser_tests:WebViewTest.Download, ran unit_tests:DownloadRequestLimiterTest*

Review URL: https://chromiumcodereview.appspot.com/13037003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@192029 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 10 insertions, 6 deletions

diff --git a/android_webview/native/aw_web_contents_delegate.cc b/android_webview/native/aw_web_contents_delegate.cc
index ef93550..427ffa3 100644
--- a/android_webview/native/aw_web_contents_delegate.cc
+++ b/android_webview/native/aw_web_contents_delegate.cc
@@ -52,13 +52,15 @@ void AwWebContentsDelegate::FindReply(WebContents* web_contents,
                                                 final_update);
 }
 
-bool AwWebContentsDelegate::CanDownload(content::RenderViewHost* source,
-                                        int request_id,
-                                        const std::string& request_method) {
+void AwWebContentsDelegate::CanDownload(
+    content::RenderViewHost* source,
+    int request_id,
+    const std::string& request_method,
+    const base::Callback<void(bool)>& callback) {
   // Android webview intercepts download in its resource dispatcher host
   // delegate, so should not reach here.
   NOTREACHED();
-  return false;
+  callback.Run(false);
 }
 
 void AwWebContentsDelegate::AddNewContents(content::WebContents* source,
diff --git a/android_webview/native/aw_web_contents_delegate.h b/android_webview/native/aw_web_contents_delegate.h
index 500097e..56fed6b 100644
--- a/android_webview/native/aw_web_contents_delegate.h
+++ b/android_webview/native/aw_web_contents_delegate.h
@@ -27,9 +27,11 @@ class AwWebContentsDelegate
                          const gfx::Rect& selection_rect,
                          int active_match_ordinal,
                          bool final_update) OVERRIDE;
-  virtual bool CanDownload(content::RenderViewHost* source,
+  virtual void CanDownload(content::RenderViewHost* source,
                            int request_id,
-                           const std::string& request_method) OVERRIDE;
+                           const std::string& request_method,
+                           const base::Callback<void(bool)>& callback) OVERRIDE;
+
   virtual void AddNewContents(content::WebContents* source,
                               content::WebContents* new_contents,
                               WindowOpenDisposition disposition,