Linux gfxtrace file association with GAPID.

kokoro/linux/gapid-mime.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<mime-info xmlns="http://www.freedesktop.org/standards/shared-mime-info">
+   <mime-type type="application/x-gfxtrace">
+     <comment>Graphics API Trace</comment>
+     <glob pattern="*.gfxtrace"/>
+   </mime-type>
+</mime-info>

kokoro/linux/gapid.desktop

@@ -7,3 +7,4 @@ Categories=Development;Debugger;Graphics;3DGraphics
 Icon=/opt/gapid/icon.png
 Exec=/opt/gapid/gapid %f
 Terminal=false
+MimeType=application/x-gfxtrace

kokoro/linux/package.sh

@@ -38,12 +38,13 @@ VERSION=$(awk -F= 'BEGIN {major=0; minor=0; micro=0}
                   END {print major"."minor"."micro}' ../pkg/build.properties)
 
 # Combine package contents.
-mkdir -p gapid/DEBIAN gapid/opt/gapid gapid/usr/share/applications gapid/usr/share/menu
+mkdir -p gapid/DEBIAN gapid/opt/gapid gapid/usr/share/applications gapid/usr/share/menu gapid/usr/share/mime/packages
 cp -r ../pkg/* gapid/opt/gapid
 cp -r ../current/java/gapic-linux.jar gapid/opt/gapid/lib/gapic.jar
 cp "$SRC/../../gapic/res/icons/logo@2x.png" gapid/opt/gapid/icon.png
 cp "$SRC/gapid.desktop" gapid/usr/share/applications/google-gapid.desktop
 cp "$SRC/gapid.menu" gapid/usr/share/menu/google-gapid.menu
+cp "$SRC/gapid-mime.xml" gapid/usr/share/mime/packages/gapid.xml
 
 # Create the dpkg config file.
 cat > gapid/DEBIAN/control <<EOF