Remove DetermineIfPageSupportsInstant and all its plumbing

chrome/renderer/searchbox/searchbox_extension.cc

 // Copyright 2012 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/renderer/searchbox/searchbox_extension.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 211 matching lines @@
     return current_url.Resolve(possibly_relative_url);
   return GURL(possibly_relative_url);
 }
 
 }  // namespace internal
 
 namespace extensions_v8 {
 
 static const char kSearchBoxExtensionName[] = "v8/EmbeddedSearch";
 
-// We first send this script down to determine if the page supports instant.
-static const char kSupportsInstantScript[] =
-    "if (window.chrome &&"
-    "    window.chrome.embeddedSearch &&"
-    "    window.chrome.embeddedSearch.searchBox &&"
-    "    window.chrome.embeddedSearch.searchBox.onsubmit &&"
-    "    typeof window.chrome.embeddedSearch.searchBox.onsubmit =="
-    "        'function') {"
-    "  true;"
-    "} else {"
-    "  false;"
-    "}";
-
 static const char kDispatchChromeIdentityCheckResult[] =
     "if (window.chrome &&"
     "    window.chrome.embeddedSearch &&"
     "    window.chrome.embeddedSearch.newTabPage &&"
     "    window.chrome.embeddedSearch.newTabPage.onsignedincheckdone &&"
     "    typeof window.chrome.embeddedSearch.newTabPage"
     "        .onsignedincheckdone === 'function') {"
     "  window.chrome.embeddedSearch.newTabPage.onsignedincheckdone(%s, %s);"
     "  true;"
     "}";
@@ skipping 198 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(SearchBoxExtensionWrapper);
 };
 
 // static
 v8::Extension* SearchBoxExtension::Get() {
   return new SearchBoxExtensionWrapper(ResourceBundle::GetSharedInstance().
       GetRawDataResource(IDR_SEARCHBOX_API));
 }
 
 // static
-bool SearchBoxExtension::PageSupportsInstant(blink::WebFrame* frame) {
-  if (!frame) return false;
-  v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
-  v8::Local<v8::Value> v = frame->ExecuteScriptAndReturnValue(
-      blink::WebScriptSource(kSupportsInstantScript));
-  return !v.IsEmpty() && v->BooleanValue();
-}
-
-// static
 void SearchBoxExtension::DispatchChromeIdentityCheckResult(
     blink::WebFrame* frame,
     const base::string16& identity,
     bool identity_match) {
   std::string escaped_identity = base::GetQuotedJSONString(identity);
   blink::WebString script(blink::WebString::FromUTF8(base::StringPrintf(
       kDispatchChromeIdentityCheckResult, escaped_identity.c_str(),
       identity_match ? "true" : "false")));
   Dispatch(frame, script);
 }
@@ skipping 619 matching lines @@
     ThrowInvalidParameters(args);
     return;
   }
 
   DVLOG(1) << render_frame << " UndoMostVisitedDeletion";
   SearchBox::Get(render_frame)
       ->UndoMostVisitedDeletion(args[0]->ToInteger()->Value());
 }
 
 }  // namespace extensions_v8