Defer media loading while on cellular networks.

third_party/WebKit/Source/core/page/NetworkStateNotifier.cpp

Index: third_party/WebKit/Source/core/page/NetworkStateNotifier.cpp
diff --git a/third_party/WebKit/Source/core/page/NetworkStateNotifier.cpp b/third_party/WebKit/Source/core/page/NetworkStateNotifier.cpp
index 06809f857e5e2330e1f938bcd59eb1161a0632f7..6a5f39d0b8ccc3fda0087f18cc2ba87c3a87491b 100644
--- a/third_party/WebKit/Source/core/page/NetworkStateNotifier.cpp
+++ b/third_party/WebKit/Source/core/page/NetworkStateNotifier.cpp
@@ -104,6 +104,15 @@ void NetworkStateNotifier::removeObserver(NetworkStateObserver* observer, Execut
 void NetworkStateNotifier::setTestUpdatesOnly(bool updatesOnly)
 {
     ASSERT(isMainThread());
+    MutexLocker locker(m_mutex);
+
+    // Reset state to default when entering or leaving test mode.
+    if (updatesOnly != m_testUpdatesOnly) {
+        m_isOnLine = true;
+        m_type = WebConnectionTypeOther;
+        m_maxBandwidthMbps = std::numeric_limits<double>::infinity();
+    }
+
     m_testUpdatesOnly = updatesOnly;
 }