Support earliest seekable time in WMPI.

third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp

Index: third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
index b83a6018955b9eb8afb3615648e7f4725bf1d7a9..81a6710562ecd65209dc301d6852355f104c1b7a 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
@@ -408,8 +408,6 @@ void MediaControlTimelineElement::defaultEventHandler(Event* event)
 
     double time = value().toDouble();
     if (event->type() == EventTypeNames::input) {
-        // FIXME: This will need to take the timeline offset into consideration
-        // once that concept is supported, see https://crbug.com/312699
         if (mediaElement().seekable()->contain(time))
             mediaElement().setCurrentTime(time);
     }
@@ -424,6 +422,11 @@ bool MediaControlTimelineElement::willRespondToMouseClickEvents()
     return inDocument() && document().isActive();
 }
 
+void MediaControlTimelineElement::setEarliestPosition(double earliestTime)
+{
+    setFloatingPointAttribute(minAttr, earliestTime);
+}
+
 void MediaControlTimelineElement::setPosition(double currentTime)
 {
     setValue(String::number(currentTime));