Start renderer in ContentViewCoreImpl::EvaluateJavaScript.

content/browser/android/content_view_core_impl.cc

Index: content/browser/android/content_view_core_impl.cc
diff --git a/content/browser/android/content_view_core_impl.cc b/content/browser/android/content_view_core_impl.cc
index 80fe628dd022781a85a0bd56fe22b32d2d270490..e72de5f1aaa24a94af00d2854a454d6d163affa6 100644
--- a/content/browser/android/content_view_core_impl.cc
+++ b/content/browser/android/content_view_core_impl.cc
@@ -1472,14 +1472,23 @@ void JavaScriptResultCallback(const ScopedJavaGlobalRef<jobject>& callback,
 void ContentViewCoreImpl::EvaluateJavaScript(JNIEnv* env,
                                              jobject obj,
                                              jstring script,
-                                             jobject callback) {
-  RenderViewHost* host = web_contents_->GetRenderViewHost();
-  DCHECK(host);
+                                             jobject callback,
+                                             jboolean start_renderer) {
+  RenderViewHost* rvh =
+      static_cast<RenderViewHost*>(web_contents_->GetRenderViewHost());
+  DCHECK(rvh);
+
+  if (start_renderer && !rvh->IsRenderViewLive()) {
+    if (!web_contents_->CreateRenderViewWithoutNavigationEntry(rvh)) {

[Charlie Reis, 2013/08/20 22:03:49]

Maybe navigate it to about:blank first instead?

[michaelbai, 2013/08/21 23:32:17]

Already tried, the Java context can not be transfer to the next page.

On 2013/08/20 22:03:49, creis wrote:

+      LOG(ERROR) << "Falied to create RenderView in EvaluateJavaScript";

[Charlie Reis, 2013/08/20 22:03:49]

nit: Failed

[michaelbai, 2013/08/21 23:32:17]

Done.

+      return;
+    }
+  }
 
   if (!callback) {
     // No callback requested.
-    host->ExecuteJavascriptInWebFrame(string16(),  // frame_xpath
-                                      ConvertJavaStringToUTF16(env, script));
+    rvh->ExecuteJavascriptInWebFrame(string16(),  // frame_xpath
+                                     ConvertJavaStringToUTF16(env, script));
     return;
   }
 
@@ -1490,7 +1499,7 @@ void ContentViewCoreImpl::EvaluateJavaScript(JNIEnv* env,
   content::RenderViewHost::JavascriptResultCallback c_callback =
       base::Bind(&JavaScriptResultCallback, j_callback);
 
-  host->ExecuteJavascriptInWebFrameCallbackResult(
+  rvh->ExecuteJavascriptInWebFrameCallbackResult(
       string16(),  // frame_xpath
       ConvertJavaStringToUTF16(env, script),
       c_callback);