Roll trace-viewer DEPS to r1489.

DEPS

 # This file is automatically processed to create .DEPS.git which is the file
 # that gclient uses under git.
 #
 # See http://code.google.com/p/chromium/wiki/UsingGit
 #
 # To test manually, run:
 #   python tools/deps2git/deps2git.py -o .DEPS.git -w <gclientdir>
 # where <gcliendir> is the absolute path to the directory containing the
 # .gclient file (the parent of "src").
 #
@@ skipping 94 matching lines @@
   "src/testing/gmock":
     Var("chromium_git") + "/external/googlemock.git@896ba0e03f520fb9b6ed582bde2bd00847e3c3f2", # from svn revision 485
 
   "src/third_party/angle":
     Var("chromium_git") + "/angle/angle.git@" + Var("angle_revision"),
 
   "src/third_party/colorama/src":
     Var("chromium_git") + "/external/colorama.git@799604a1041e9b3bc5d2789ecbd7e8db2e18e6b8",
 
   "src/third_party/trace-viewer":
-    Var("chromium_git") + "/external/trace-viewer.git@5f89b7cd5732ddf7e783bb6c9fe57bb8a7cf74e2", # from svn revision 1471
+    Var("chromium_git") + "/external/trace-viewer.git@6f49169ab7d1d58a6c10e6631ebe91f191b4892b", # from svn revision 1489
 
   "src/third_party/WebKit":
     Var("webkit_trunk") + "@" + Var("webkit_revision"),
 
   "src/third_party/WebKit/LayoutTests/w3c/web-platform-tests":
     Var("chromium_git") +
     "/external/w3c/web-platform-tests.git@fd608375f09b02b54ccba4e99be8365769be43c5",
 
   "src/third_party/WebKit/LayoutTests/w3c/csswg-test":
     Var("chromium_git") +
@@ skipping 688 matching lines @@
                 "src/third_party/apache-win32",
     ],
   },
   {
     # A change to a .gyp, .gypi, or to GYP itself should run the generator.
     "name": "gyp",
     "pattern": ".",
     "action": ["python", "src/build/gyp_chromium"],
   },
 ]