Get rid of view_messages.h dependency in extension_messages_browsertest.cc by adding a method to ...

content/test/mock_render_thread.cc

Index: content/test/mock_render_thread.cc
===================================================================
--- content/test/mock_render_thread.cc	(revision 112878)
+++ content/test/mock_render_thread.cc	(working copy)
@@ -19,6 +19,17 @@
 MockRenderThread::~MockRenderThread() {
 }
 
+void MockRenderThread::VerifyRunJavaScriptMessageSend(
+    const string16& expected_alert_message) {
+  const IPC::Message* alert_msg =
+      sink_.GetUniqueMessageMatching(ViewHostMsg_RunJavaScriptMessage::ID);
+  ASSERT_TRUE(alert_msg);
+  void* iter = IPC::SyncMessage::GetDataIterator(alert_msg);
+  ViewHostMsg_RunJavaScriptMessage::SendParam alert_param;
+  ASSERT_TRUE(IPC::ReadParam(alert_msg, &iter, &alert_param));
+  EXPECT_EQ(expected_alert_message, alert_param.a);
+}
+
 // Called by the Widget. Used to send messages to the browser.
 // We short-circuit the mechanism and handle the messages right here on this
 // class.