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

chrome/browser/ui/search/search_ipc_router_unittest.cc

Index: chrome/browser/ui/search/search_ipc_router_unittest.cc
diff --git a/chrome/browser/ui/search/search_ipc_router_unittest.cc b/chrome/browser/ui/search/search_ipc_router_unittest.cc
index fc9d79ccabcf3ac6fbbf9f5fb971f660d6677e1e..44aaaaab8c8d668a084ae7afbb6b88f298c23d95 100644
--- a/chrome/browser/ui/search/search_ipc_router_unittest.cc
+++ b/chrome/browser/ui/search/search_ipc_router_unittest.cc
@@ -184,7 +184,10 @@ class SearchIPCRouterTest : public BrowserWithTestWindowTest {
   }
 
   void OnMessageReceived(const IPC::Message& message) {
-    GetSearchIPCRouter().OnMessageReceived(message);
+    bool should_handle_message =
+        chrome::IsRenderedInInstantProcess(web_contents(), profile());
+    bool handled = GetSearchIPCRouter().OnMessageReceived(message);
+    ASSERT_EQ(should_handle_message, handled);
   }
 
   bool IsActiveTab(content::WebContents* contents) {
@@ -196,6 +199,26 @@ class SearchIPCRouterTest : public BrowserWithTestWindowTest {
   base::FieldTrialList field_trial_list_;
 };
 
+TEST_F(SearchIPCRouterTest, IgnoreMessagesFromNonInstantRenderers) {
+  NavigateAndCommitActiveTab(GURL("file://foo/bar"));
+  SetupMockDelegateAndPolicy();
+  GURL destination_url("www.foo.com");
+  EXPECT_CALL(*mock_delegate(), NavigateToURL(destination_url, CURRENT_TAB,
+                                              true)).Times(0);
+  content::WebContents* contents = web_contents();
+  bool is_active_tab = IsActiveTab(contents);
+  EXPECT_TRUE(is_active_tab);
+
+  MockSearchIPCRouterPolicy* policy = GetSearchIPCRouterPolicy();
+  EXPECT_CALL(*policy, ShouldProcessNavigateToURL(is_active_tab)).Times(0);
+
+  scoped_ptr<IPC::Message> message(new ChromeViewHostMsg_SearchBoxNavigate(
+      contents->GetRoutingID(),
+      GetSearchIPCRouterSeqNo(),
+      destination_url, CURRENT_TAB, true));
+  OnMessageReceived(*message);
+}
+
 TEST_F(SearchIPCRouterTest, ProcessVoiceSearchSupportMsg) {
   NavigateAndCommitActiveTab(GURL("chrome-search://foo/bar"));
   SetupMockDelegateAndPolicy();
@@ -285,7 +308,7 @@ TEST_F(SearchIPCRouterTest, HandleTabChangedEvents) {
 }
 
 TEST_F(SearchIPCRouterTest, ProcessNavigateToURLMsg) {
-  NavigateAndCommitActiveTab(GURL("chrome-search://foo/bar"));
+  NavigateAndCommitActiveTab(GURL(chrome::kChromeSearchLocalNtpUrl));
   SetupMockDelegateAndPolicy();
   GURL destination_url("www.foo.com");
   EXPECT_CALL(*mock_delegate(), NavigateToURL(destination_url, CURRENT_TAB,