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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.chrome.browser; | 5 package org.chromium.chrome.browser; |
6 | 6 |
7 import android.annotation.SuppressLint; | 7 import android.annotation.SuppressLint; |
8 import android.content.Context; | 8 import android.content.Context; |
9 import android.net.Uri; | 9 import android.net.Uri; |
10 import android.os.AsyncTask; | 10 import android.os.AsyncTask; |
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248 if (mDnsRequestsInFlight.contains(url)) { | 248 if (mDnsRequestsInFlight.contains(url)) { |
249 // Note that if two requests come for the same URL with two differen
t profiles, the last | 249 // Note that if two requests come for the same URL with two differen
t profiles, the last |
250 // one will win. | 250 // one will win. |
251 mPendingPreconnectWithProfile.put(url, profile); | 251 mPendingPreconnectWithProfile.put(url, profile); |
252 } else { | 252 } else { |
253 nativePreconnectUrlAndSubresources(profile, url); | 253 nativePreconnectUrlAndSubresources(profile, url); |
254 } | 254 } |
255 } | 255 } |
256 | 256 |
257 /** | 257 /** |
| 258 * Warms up a spare, empty RenderProcessHost that may be used for subsequent
navigations. |
| 259 * |
| 260 * The spare RenderProcessHost will be used automatically in subsequent navi
gations. |
| 261 * There is nothing further the WarmupManager needs to do to enable that use
. |
| 262 * |
| 263 * This uses a different mechanism than createSpareWebContents, below, and i
s subject |
| 264 * to fewer restrictions. |
| 265 * |
| 266 * This must be called from the UI thread. |
| 267 */ |
| 268 public void createSpareRenderProcessHost(Profile profile) { |
| 269 ThreadUtils.assertOnUiThread(); |
| 270 if (ChromeFeatureList.isEnabled(ChromeFeatureList.OMNIBOX_SPARE_RENDERER
)) { |
| 271 // Spare WebContents should not be used with spare RenderProcessHost
s, but if one |
| 272 // has been created, destroy it in order not to consume too many pro
cesses. |
| 273 destroySpareWebContents(); |
| 274 nativeWarmupSpareRenderer(profile); |
| 275 } |
| 276 } |
| 277 |
| 278 /** |
258 * Creates and initializes a spare WebContents, to be used in a subsequent n
avigation. | 279 * Creates and initializes a spare WebContents, to be used in a subsequent n
avigation. |
259 * | 280 * |
260 * This creates a renderer that is suitable for any navigation. It can be pi
cked up by any tab. | 281 * This creates a renderer that is suitable for any navigation. It can be pi
cked up by any tab. |
261 * Can be called multiple times, and must be called from the UI thread. | 282 * Can be called multiple times, and must be called from the UI thread. |
262 * Note that this is a no-op on low-end devices. | 283 * Note that this is a no-op on low-end devices. |
263 */ | 284 */ |
264 public void createSpareWebContents() { | 285 public void createSpareWebContents() { |
265 ThreadUtils.assertOnUiThread(); | 286 ThreadUtils.assertOnUiThread(); |
266 if (mSpareWebContents != null || SysUtils.isLowEndDevice()) return; | 287 if (mSpareWebContents != null || SysUtils.isLowEndDevice()) return; |
267 mSpareWebContents = WebContentsFactory.createWebContentsWithWarmRenderer
(false, false); | 288 mSpareWebContents = WebContentsFactory.createWebContentsWithWarmRenderer
(false, false); |
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313 mSpareWebContents = null; | 334 mSpareWebContents = null; |
314 mObserver = null; | 335 mObserver = null; |
315 } | 336 } |
316 | 337 |
317 private static void recordWebContentsStatus(int status) { | 338 private static void recordWebContentsStatus(int status) { |
318 RecordHistogram.recordEnumeratedHistogram( | 339 RecordHistogram.recordEnumeratedHistogram( |
319 WEBCONTENTS_STATUS_HISTOGRAM, status, WEBCONTENTS_STATUS_COUNT); | 340 WEBCONTENTS_STATUS_HISTOGRAM, status, WEBCONTENTS_STATUS_COUNT); |
320 } | 341 } |
321 | 342 |
322 private static native void nativePreconnectUrlAndSubresources(Profile profil
e, String url); | 343 private static native void nativePreconnectUrlAndSubresources(Profile profil
e, String url); |
| 344 private static native void nativeWarmupSpareRenderer(Profile profile); |
323 } | 345 } |
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