Fix handling of empty URLs when setting up the NoDomain error page

Bug: 5293606
Change-Id: Iace4f8a56bc4d8b8cbd01fb369cecf22564b7c8c

1 files changed, 7 insertions, 1 deletions

diff --git a/Source/WebKit/android/WebCoreSupport/FrameLoaderClientAndroid.cpp b/Source/WebKit/android/WebCoreSupport/FrameLoaderClientAndroid.cpp
index 9de6c09..31eed62 100644
--- a/Source/WebKit/android/WebCoreSupport/FrameLoaderClientAndroid.cpp
+++ b/Source/WebKit/android/WebCoreSupport/FrameLoaderClientAndroid.cpp
@@ -373,10 +373,16 @@ void FrameLoaderClientAndroid::dispatchDidFailProvisionalLoad(const ResourceErro
             url.append(buf, res);
         }
     }
+    // Vector sets up its data buffer lazilly, so if failingUrl is the empty
+    // string, the data buffer will be null. This will result in sanitizedUrl
+    // being null, and the string substitution below will be a no-op.
+    // FIXME: Ideally we'd always have a non-empty URL, or at least improve the
+    // wording of the error page in this case. See http://b/5293782.
+    String sanitizedUrl = url.data() ? String(url.data(), url.size()) : "";
 
     // Replace all occurances of %s with the failing url.
     String s = UTF8Encoding().decode((const char*)a->getBuffer(false), a->getLength());
-    s = s.replace("%s", String(url.data(), url.size()));
+    s = s.replace("%s", sanitizedUrl);
 
     // Replace all occurances of %e with the error text
     s = s.replace("%e", error.localizedDescription());