android: Add a method to let Java know whether a prerender has finished loading.

chrome/browser/prerender/external_prerender_handler_android.cc

Index: chrome/browser/prerender/external_prerender_handler_android.cc
diff --git a/chrome/browser/prerender/external_prerender_handler_android.cc b/chrome/browser/prerender/external_prerender_handler_android.cc
index 8714710bff238039b904da3516153d0a12819218..2981f73561a4f529361cdb028c1996ccff1fdde0 100644
--- a/chrome/browser/prerender/external_prerender_handler_android.cc
+++ b/chrome/browser/prerender/external_prerender_handler_android.cc
@@ -22,6 +22,33 @@ using base::android::ConvertJavaStringToUTF16;
 
 namespace prerender {
 
+namespace {
+
+static bool CheckAndConvertParams(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& jprofile,
+    const JavaParamRef<jstring>& jurl,
+    const JavaParamRef<jobject>& jweb_contents,
+    GURL* url,
+    prerender::PrerenderManager** prerender_manager,
+    content::WebContents** web_contents) {
+  if (jurl == NULL)
+    return false;
+  *url = GURL(ConvertJavaStringToUTF16(env, jurl));
+  if (!url->is_valid())
+    return false;
+
+  Profile* profile = ProfileAndroid::FromProfileAndroid(jprofile);
+  *prerender_manager =
+      prerender::PrerenderManagerFactory::GetForProfile(profile);
+  if (!*prerender_manager)
+    return false;
+  *web_contents = content::WebContents::FromJavaWebContents(jweb_contents);
+  return true;
+}
+
+}  // namespace
+
 bool ExternalPrerenderHandlerAndroid::AddPrerender(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
@@ -75,20 +102,29 @@ static jboolean HasPrerenderedUrl(JNIEnv* env,
                                   const JavaParamRef<jobject>& jprofile,
                                   const JavaParamRef<jstring>& jurl,
                                   const JavaParamRef<jobject>& jweb_contents) {
-  if (jurl == NULL)
+  GURL url;
+  prerender::PrerenderManager* prerender_manager;
+  content::WebContents* web_contents;
+  if (!CheckAndConvertParams(env, jprofile, jurl, jweb_contents, &url,
+                             &prerender_manager, &web_contents))
     return false;
+  return prerender_manager->HasPrerenderedUrl(url, web_contents);
+}
 
-  Profile* profile = ProfileAndroid::FromProfileAndroid(jprofile);
-  GURL url = GURL(ConvertJavaStringToUTF16(env, jurl));
-  if (!url.is_valid())
-    return false;
-  prerender::PrerenderManager* prerender_manager =
-          prerender::PrerenderManagerFactory::GetForProfile(profile);
-  if (!prerender_manager)
+static jboolean HasPrerenderedAndFinishedLoadingUrl(
+    JNIEnv* env,
+    const JavaParamRef<jclass>& clazz,
+    const JavaParamRef<jobject>& jprofile,
+    const JavaParamRef<jstring>& jurl,
+    const JavaParamRef<jobject>& jweb_contents) {
+  GURL url;
+  prerender::PrerenderManager* prerender_manager;
+  content::WebContents* web_contents;
+  if (!CheckAndConvertParams(env, jprofile, jurl, jweb_contents, &url,
+                             &prerender_manager, &web_contents))
     return false;
-  content::WebContents* web_contents =
-      content::WebContents::FromJavaWebContents(jweb_contents);
-  return prerender_manager->HasPrerenderedUrl(url, web_contents);
+  return prerender_manager->HasPrerenderedAndFinishedLoadingUrl(url,
+                                                                web_contents);
 }
 
 ExternalPrerenderHandlerAndroid::ExternalPrerenderHandlerAndroid() {}