Add a method to RenderViewImpl to retrieve the length of the session history

We need this information to implement the WebTestDelegate interface.

BUG=111316
[email protected]

Review URL: https://codereview.chromium.org/12319014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@183772 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index b1ec246..a6a7d07 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -6673,6 +6673,10 @@
 }
 #endif
 
+unsigned RenderViewImpl::GetLocalSessionHistoryLengthForTesting() const {
+  return history_list_length_;
+}
+
 void RenderViewImpl::OnReleaseDisambiguationPopupDIB(
     TransportDIB::Handle dib_handle) {
   TransportDIB* dib = TransportDIB::CreateWithHandle(dib_handle);