Add ExternalPrerenderRequestHandler and related API

chrome/browser/android/external_prerender_request_handler.h

Index: chrome/browser/android/external_prerender_request_handler.h
diff --git a/chrome/browser/android/external_prerender_request_handler.h b/chrome/browser/android/external_prerender_request_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..2cc79daf016d2299e40aafd370712e61688e2555
--- /dev/null
+++ b/chrome/browser/android/external_prerender_request_handler.h
@@ -0,0 +1,53 @@
+// Copyright 2013 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.
+
+#ifndef CHROME_BROWSER_ANDROID_EXTERNAL_PRERENDER_REQUEST_HANDLER_H_
+#define CHROME_BROWSER_ANDROID_EXTERNAL_PRERENDER_REQUEST_HANDLER_H_
+
+#include <jni.h>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+
+class GURL;
+class Profile;
+
+namespace content {
+class WebContents;
+}
+
+namespace prerender {
+class PrerenderHandle;
+
+// A class for handling external prerender requests from other applications.
+class ExternalPrerenderRequestHandler {

[cbentzel, 2013/10/30 14:40:33]

Perhaps IntentTriggeredPrerenderRequestHandler? External is a bit of a vague
name,

[Yusuf, 2013/10/30 17:28:55]

One thing with mentioning intents is, the prerender itself wont actually be
triggered by the intent. It will be triggered by a message coming to our
service. The intent will be used to eventually load the url.


On 2013/10/30 14:40:33, cbentzel wrote:

+ public:
+  int AddPrerender(JNIEnv* env,

[cbentzel, 2013/10/30 14:40:33]

Please document these methods - what does the return value mean, for example?

[Yusuf, 2013/10/31 00:44:18]

Done.

+                   jobject obj,
+                   jobject profile,
+                   jstring url,
+                   jstring referrer,

[cbentzel, 2013/10/30 14:40:33]

referrer is probably OK for now but I could imagine generalizing this to other
headers.

[Yusuf, 2013/10/31 00:44:18]

Noted.
On 2013/10/30 14:40:33, cbentzel wrote:

+                   jint width,
+                   jint height);
+
+  void CancelCurrentPrerender(JNIEnv* env, jobject object);
+
+  static bool HasPrerenderedUrl(Profile* profile,
+                                GURL url,
+                                content::WebContents* web_contents);
+
+  static bool RegisterExternalPrerenderRequestHandler(JNIEnv* env);
+
+  explicit ExternalPrerenderRequestHandler();

[cbentzel, 2013/10/30 14:40:33]

Nit: this should be at the top of the methods.

[Yusuf, 2013/10/31 00:44:18]

Done.

+
+ private:
+  scoped_ptr<prerender::PrerenderHandle> prerender_handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExternalPrerenderRequestHandler);
+};
+
+} // namespace prerender

[cbentzel, 2013/10/30 14:40:33]

Not sure if this should be in the prerender namespace given that it is not in
that directory.

[Yusuf, 2013/10/30 17:28:55]

Would you prefer this to be in prerender/?


On 2013/10/30 14:40:33, cbentzel wrote:

[cbentzel, 2013/10/30 18:45:59]

I think it makes more sense there (and the ChromeOS one should also move there).

+
+#endif  // CHROME_BROWSER_ANDROID_EXTERNAL_PRERENDER_REQUEST_HANDLER_H_