[Blimp Client] Fixes up URL before sending it to Engine.

blimp/client/feature/navigation_feature.cc

Index: blimp/client/feature/navigation_feature.cc
diff --git a/blimp/client/feature/navigation_feature.cc b/blimp/client/feature/navigation_feature.cc
index 9128c64ec2320d64231ee2e999bcdd3171b5a014..34922363c31c9f7ba0b82d393e55fdf79b318457 100644
--- a/blimp/client/feature/navigation_feature.cc
+++ b/blimp/client/feature/navigation_feature.cc
@@ -10,8 +10,11 @@
 #include "blimp/common/create_blimp_message.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/common/proto/navigation.pb.h"
+#include "components/url_formatter/url_fixer.h"
 #include "net/base/net_errors.h"
 #include "url/gurl.h"
+#include "url/url_canon.h"
+#include "url/url_util.h"
 
 namespace blimp {
 namespace client {
@@ -39,11 +42,28 @@ void NavigationFeature::RemoveDelegate(int tab_id) {
 
 void NavigationFeature::NavigateToUrlText(int tab_id,
                                           const std::string& url_text) {
+  // Fixes up url, e.g., convert "google.com" to "http://google.com".
+  // It also converts "example" to "http://example/" (a valid GURL but no
+  // website). In order to use search instead in this case, we check
+  // the host part of the URL to see if it contains '.', and use search
+  // instead if it does not. Note that this heuristic is not correct, since
+  // valid GURL such as "chrome://version/" do not have '.'. The heuristic is
+  // used only for v0.5 and useful for dev&test.
+  // TODO(haibinlu): Remove once omnibox is used.
+  GURL url = url_formatter::FixupURL(url_text, std::string());
+  if (!url.is_valid() || url.host_piece().find('.') == std::string::npos) {
+    url::RawCanonOutputT<char> buffer;
+    url::EncodeURIComponent(url_text.data(), url_text.size(), &buffer);
+    std::string encoded_query(buffer.data(), buffer.length());
+    url = GURL("https://www.google.com/#q=" + encoded_query);
+    DCHECK(url.is_valid());
+  }
+
   NavigationMessage* navigation_message;
   std::unique_ptr<BlimpMessage> blimp_message =
       CreateBlimpMessage(&navigation_message, tab_id);
   navigation_message->set_type(NavigationMessage::LOAD_URL);
-  navigation_message->mutable_load_url()->set_url(url_text);
+  navigation_message->mutable_load_url()->set_url(url.spec());
   outgoing_message_processor_->ProcessMessage(std::move(blimp_message),
                                               net::CompletionCallback());
 }