Give a document icon to Chromium for file types it can view when preview is t...

chrome/chrome.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
@@ skipping 3177 matching lines @@
         ['OS=="linux" and (toolkit_views==1 or chromeos==1)', {
           'dependencies': [
             '../views/views.gyp:views',
           ],
         }],
         ['OS=="mac"', {
           # 'branding' is a variable defined in common.gypi
           # (e.g. "Chromium", "Chrome")
           'conditions': [
             ['branding=="Chrome"', {
-              'mac_bundle_resources': ['app/theme/google_chrome/app.icns'],
+              'mac_bundle_resources': [
+                'app/theme/google_chrome/app.icns',
+                'app/theme/google_chrome/document.icns',
+              ],
               'copies': [
                 {
                   'destination': '<(PRODUCT_DIR)/<(mac_product_name).app/Contents/MacOS',
                   'files': [
                     '../third_party/ffmpeg/binaries/chrome/libavcodec.52.dylib',
                     '../third_party/ffmpeg/binaries/chrome/libavformat.52.dylib',
                     '../third_party/ffmpeg/binaries/chrome/libavutil.50.dylib',
                   ],
                 },
               ],
             }, {  # else: 'branding!="Chrome"
-              'mac_bundle_resources': ['app/theme/chromium/app.icns'],
+              'mac_bundle_resources': [
+                'app/theme/chromium/app.icns',
+                'app/theme/chromium/document.icns',
+              ],
               'copies': [
                 {
                   'destination': '<(PRODUCT_DIR)/<(mac_product_name).app/Contents/MacOS',
                   'files': [
                     '../third_party/ffmpeg/binaries/chromium/libavcodec.52.dylib',
                     '../third_party/ffmpeg/binaries/chromium/libavformat.52.dylib',
                     '../third_party/ffmpeg/binaries/chromium/libavutil.50.dylib',
                   ],
                 },
               ],
@@ skipping 2882 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }