[MediaElement] Allow preloading for non-network scheme src

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
index 49afa3146a37a67f9947b9891dd9ee4d4341cb18..d9a00f3ae0029fb5267e383d3f68fc76ade135ed 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
@@ -2073,7 +2073,9 @@ WebMediaPlayer::Preload HTMLMediaElement::preloadType() const {
   // Force preload to 'none' on Data Saver and for low end devices.

[mlamouri (slow - plz ping), 2016/12/05 13:32:44]

Can you update the comment? Or actually remove it because it just describes in
words what's in the condition.

[Zhiqiang Zhang (Slow), 2016/12/05 16:32:19]

Updated comments.

   if (document().settings() &&
       (document().settings()->dataSaverEnabled() ||
-       document().settings()->forcePreloadNoneForMediaElements())) {
+       document().settings()->forcePreloadNoneForMediaElements()) &&
+      (m_currentSrc.protocol() != "blob" && m_currentSrc.protocol() != "data" &&
+       m_currentSrc.protocol() != "file")) {
     UseCounter::count(document(),
                       UseCounter::HTMLMediaElementPreloadForcedNone);
     return WebMediaPlayer::PreloadNone;