Discard ChromeViewHostMsg_SearchBox* IPCs if they not sent from an Instant process.

chrome/browser/ui/search/search_ipc_router_policy_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/search/search_ipc_router.h"
 
 #include "build/build_config.h"
 #include "base/command_line.h"
 #include "chrome/browser/ui/search/search_ipc_router_policy_impl.h"
 #include "chrome/browser/ui/search/search_tab_helper.h"
@@ skipping 95 matching lines @@
   // Process message only if the underlying page is an InstantNTP.
   NavigateAndCommitActiveTab(GURL("chrome-search://foo/bar"));
   EXPECT_FALSE(GetSearchIPCRouterPolicy()->ShouldProcessChromeIdentityCheck());
 }
 
 TEST_F(SearchIPCRouterPolicyTest, ProcessNavigateToURL) {
   NavigateAndCommitActiveTab(GURL(chrome::kChromeSearchLocalNtpUrl));
   EXPECT_TRUE(GetSearchIPCRouterPolicy()->ShouldProcessNavigateToURL(true));
 }
 
+TEST_F(SearchIPCRouterPolicyTest, DoNotProcessNavigateToURL) {
+  NavigateAndCommitActiveTab(GURL("chrome-search://foo/bar"));
+  EXPECT_FALSE(GetSearchIPCRouterPolicy()->ShouldProcessNavigateToURL(true));
+
+  NavigateAndCommitActiveTab(GURL("file://foo/bar"));
+  EXPECT_FALSE(GetSearchIPCRouterPolicy()->ShouldProcessNavigateToURL(true));
+}
+
 TEST_F(SearchIPCRouterPolicyTest, ProcessPasteIntoOmniboxMsg) {
   NavigateAndCommitActiveTab(GURL(chrome::kChromeSearchLocalNtpUrl));
   EXPECT_TRUE(GetSearchIPCRouterPolicy()->ShouldProcessPasteIntoOmnibox(true));
 }
 
 TEST_F(SearchIPCRouterPolicyTest, DoNotProcessPasteIntoOmniboxMsg) {
   // Process message only if the current tab is an Instant NTP.
   NavigateAndCommitActiveTab(GURL("chrome-search://foo/bar"));
   EXPECT_FALSE(GetSearchIPCRouterPolicy()->ShouldProcessPasteIntoOmnibox(true));
 }
@@ skipping 89 matching lines @@
 
 TEST_F(SearchIPCRouterPolicyTest, SubmitQuery) {
   NavigateAndCommitActiveTab(GURL("chrome-search://foo/bar"));
   EXPECT_TRUE(GetSearchIPCRouterPolicy()->ShouldSubmitQuery());
 }
 
 TEST_F(SearchIPCRouterPolicyTest, SendToggleVoiceSearch) {
   NavigateAndCommitActiveTab(GURL(chrome::kChromeSearchLocalNtpUrl));
   EXPECT_TRUE(GetSearchIPCRouterPolicy()->ShouldSendToggleVoiceSearch());
 }