4f4d8b5349dae172cff2ad34673dcafb151784e7

Now that we're in chromium, we can tell if about:tracing is enabled ot not! Turn on overdraw metrics, and their expensive computations, only when about:tracing is turned on. When we do turn them on, we don't want the performance characteristics of the system to suddenly change, or the tracing is not very meaningful! So, we track the number of pixels read, instead of written, for overdraw (which should mostly be the same with the new rasterScale feature). This computation is very cheap compared to the old one. TBR=jamesr BUG=119126 Relanding: https://codereview.chromium.org/11293143/ Review URL: https://codereview.chromium.org/11312129 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@166521 0039d316-1c4b-4281-b951-d872f2087c98
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Description
Chromium是一个开源浏览器项目,提供了一种安全、快速、稳定的方法来体验Web。该浏览器可以在多个平台上下载,包括Mac、Windows、Linux和ChromiumOS。项目原始地址: https://chromium.googlesource.com/chromium/src.git
https://www.mobibrw.com/gitea-mirrors/chromium/src.git
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