diff --git a/scm.py b/scm.py
index 872b3fe05..f0b956ab4 100644
--- a/scm.py
+++ b/scm.py
@@ -659,6 +659,7 @@ class SVN(object):
     used.
     The diff will always use relative paths.
     """
+    assert isinstance(filenames, (list, tuple))
     previous_cwd = os.getcwd()
     root = root or SVN.GetCheckoutRoot(previous_cwd)
     root = os.path.normcase(os.path.join(root, ''))
@@ -703,7 +704,14 @@ class SVN(object):
             rev = int(info.get('Copied From Rev'))
             assert srcurl.startswith(root)
             src = srcurl[len(root)+1:]
-            srcinfo = SVN.CaptureInfo(srcurl)
+            try:
+              srcinfo = SVN.CaptureInfo(srcurl)
+            except gclient_utils.CheckCallError, e:
+              if not 'Not a valid URL' in e.stderr:
+                raise
+              # Assume the file was deleted. No idea how to figure out at which
+              # revision the file was deleted.
+              srcinfo = {'Revision': rev}
             if (srcinfo.get('Revision') != rev and
                 SVN.Capture(['diff', '-r', '%d:head' % rev, srcurl])):
               metaheaders.append("#$ svn cp -r %d %s %s "
diff --git a/tests/presubmit_unittest.py b/tests/presubmit_unittest.py
index 679a574e3..8c0c5d664 100755
--- a/tests/presubmit_unittest.py
+++ b/tests/presubmit_unittest.py
@@ -257,8 +257,8 @@ class PresubmitUnittest(PresubmitTestsBase):
     presubmit.scm.SVN.CaptureInfo(notfound).AndReturn({})
     presubmit.scm.SVN.CaptureInfo(flap).AndReturn(
             {'URL': 'svn:/foo/boo/flap.h'})
-    presubmit.scm.SVN.GenerateDiff(blat).AndReturn(self.presubmit_diffs)
-    presubmit.scm.SVN.GenerateDiff(notfound).AndReturn(self.presubmit_diffs)
+    presubmit.scm.SVN.GenerateDiff([blat]).AndReturn(self.presubmit_diffs)
+    presubmit.scm.SVN.GenerateDiff([notfound]).AndReturn(self.presubmit_diffs)
 
     self.mox.ReplayAll()
 
@@ -776,8 +776,8 @@ class InputApiUnittest(PresubmitTestsBase):
     presubmit.scm.SVN.GetFileProperty(another, 'svn:mime-type').AndReturn(None)
     presubmit.scm.SVN.GetFileProperty(third_party, 'svn:mime-type'
         ).AndReturn(None)
-    presubmit.scm.SVN.GenerateDiff(blat).AndReturn(self.presubmit_diffs)
-    presubmit.scm.SVN.GenerateDiff(another).AndReturn(self.presubmit_diffs)
+    presubmit.scm.SVN.GenerateDiff([blat]).AndReturn(self.presubmit_diffs)
+    presubmit.scm.SVN.GenerateDiff([another]).AndReturn(self.presubmit_diffs)
 
     self.mox.ReplayAll()