Fix content/common depending on content/shell.

content/shell/common/shell_content_client.cc

Index: content/shell/common/shell_content_client.cc
diff --git a/content/shell/common/shell_content_client.cc b/content/shell/common/shell_content_client.cc
index 82c2f0c5033802df64e4fbf3a6e9e7923c1e8b76..ecb53f2267aabf3dfa4e3e49b112a493797d5954 100644
--- a/content/shell/common/shell_content_client.cc
+++ b/content/shell/common/shell_content_client.cc
@@ -13,6 +13,7 @@
 #include "content/app/strings/grit/content_strings.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/user_agent.h"
+#include "content/shell/common/shell_messages.h"
 #include "content/shell/common/shell_switches.h"
 #include "grit/shell_resources.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -48,6 +49,12 @@ ShellContentClient::ShellContentClient()
 
 ShellContentClient::~ShellContentClient() {}
 
+bool ShellContentClient::CanSendWhileSwappedOut(const IPC::Message* message) {
+  // Used in layout tests; handled in BlinkTestController.
+  return message->type() == ShellViewHostMsg_PrintMessage::ID ||
+         message->type() == ShellViewHostMsg_LayoutDumpFlagsChanged::ID;
+}
+
 std::string ShellContentClient::GetUserAgent() const {
   return GetShellUserAgent();
 }