Use "int" instead of "long" for bindings where the WebIDL uses "long".

Source/core/html/track/TextTrackRegion.cpp

Index: Source/core/html/track/TextTrackRegion.cpp
diff --git a/Source/core/html/track/TextTrackRegion.cpp b/Source/core/html/track/TextTrackRegion.cpp
index 236f2f788e325d9f5e1e4f1faba78e83af99763c..7c2a517aeb1de1a9224d2b54b2ede0378b4fa599 100644
--- a/Source/core/html/track/TextTrackRegion.cpp
+++ b/Source/core/html/track/TextTrackRegion.cpp
@@ -54,7 +54,7 @@ namespace WebCore {
 static const float defaultWidth = 100;
 
 // The region has, by default, 3 lines of text.
-static const long defaultHeightInLines = 3;
+static const int defaultHeightInLines = 3;
 
 // The region and viewport are anchored in the bottom left corner.
 static const float defaultAnchorPointX = 0;
@@ -114,7 +114,7 @@ void TextTrackRegion::setWidth(double value, ExceptionCode& ec)
     m_width = value;
 }
 
-void TextTrackRegion::setHeight(long value, ExceptionCode& ec)
+void TextTrackRegion::setHeight(int value, ExceptionCode& ec)
 {
     if (value < 0) {
         ec = IndexSizeError;