Replace tabs with spaces in gyp file.

components/sessions.gypi

 # Copyright 2013 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': {
     # Core sources shared by sessions_content and sessions_ios.
     #
     # TODO(rohitrao): We are including these sources directly into each
     # individual target in order to avoid the complications associated with
@@ skipping 56 matching lines @@
           ]
         }],
       ],
     },
   ],
 
   # Platform-specific targets.
   'conditions': [
     ['OS!="ios"', {
       'targets': [
-        {
-          # GN version: //components/sessions:sessions_content
-          'target_name': 'sessions_content',
-          'type': '<(component)',
-          'dependencies': [
-            '../base/base.gyp:base',
-            '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
-            '../content/content.gyp:content_browser',
-            '../skia/skia.gyp:skia',
-            '../third_party/protobuf/protobuf.gyp:protobuf_lite',
-            '../ui/base/ui_base.gyp:ui_base',
+        {
+          # GN version: //components/sessions:sessions_content
+          'target_name': 'sessions_content',
+          'type': '<(component)',
+          'dependencies': [
+            '../base/base.gyp:base',
+            '../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
+            '../content/content.gyp:content_browser',
+            '../skia/skia.gyp:skia',
+            '../third_party/protobuf/protobuf.gyp:protobuf_lite',
+            '../ui/base/ui_base.gyp:ui_base',
             '../ui/gfx/gfx.gyp:gfx_geometry',
-            '../url/url.gyp:url_lib',
-          ],
-          'include_dirs': [
-            '..',
-          ],
-          'defines': [
-            'SESSIONS_IMPLEMENTATION',
-          ],
-          'sources': [
-            # Note: sources list duplicated in GN build.
-            '<@(sessions_core_sources)',
+            '../url/url.gyp:url_lib',
+          ],
+          'include_dirs': [
+            '..',
+          ],
+          'defines': [
+            'SESSIONS_IMPLEMENTATION',
+          ],
+          'sources': [
+            # Note: sources list duplicated in GN build.
+            '<@(sessions_core_sources)',
 
-            'sessions/content/content_serialized_navigation_builder.cc',
-            'sessions/content/content_serialized_navigation_builder.h',
-            'sessions/content/content_serialized_navigation_driver.cc',
-            'sessions/content/content_serialized_navigation_driver.h',
-          ],
-          'conditions': [
-            ['android_webview_build == 0', {
-              'dependencies': [
-                 '../sync/sync.gyp:sync',
-              ]
-            }],
-          ],
-        },
+            'sessions/content/content_serialized_navigation_builder.cc',
+            'sessions/content/content_serialized_navigation_builder.h',
+            'sessions/content/content_serialized_navigation_driver.cc',
+            'sessions/content/content_serialized_navigation_driver.h',
+          ],
+          'conditions': [
+            ['android_webview_build == 0', {
+              'dependencies': [
+                 '../sync/sync.gyp:sync',
+              ]
+            }],
+          ],
+        },
       ],
     }, {  # OS==ios
       'targets': [
-        {
-          'target_name': 'sessions_ios',
-          'type': 'static_library',
-          'dependencies': [
-            '../base/base.gyp:base',
+        {
+          'target_name': 'sessions_ios',
+          'type': 'static_library',
+          'dependencies': [
+            '../base/base.gyp:base',
             '../ios/web/ios_web.gyp:ios_web',
             '../sync/sync.gyp:sync',
-            '../third_party/protobuf/protobuf.gyp:protobuf_lite',
-            '../ui/base/ui_base.gyp:ui_base',
+            '../third_party/protobuf/protobuf.gyp:protobuf_lite',
+            '../ui/base/ui_base.gyp:ui_base',
             '../ui/gfx/gfx.gyp:gfx_geometry',
-            '../url/url.gyp:url_lib',
-          ],
-          'include_dirs': [
-            '..',
-          ],
-          'defines': [
-            'SESSIONS_IMPLEMENTATION',
-          ],
-          'sources': [
-            '<@(sessions_core_sources)',
+            '../url/url.gyp:url_lib',
+          ],
+          'include_dirs': [
+            '..',
+          ],
+          'defines': [
+            'SESSIONS_IMPLEMENTATION',
+          ],
+          'sources': [
+            '<@(sessions_core_sources)',
 
-            'sessions/ios/ios_serialized_navigation_builder.cc',
-            'sessions/ios/ios_serialized_navigation_builder.h',
-            'sessions/ios/ios_serialized_navigation_driver.cc',
-            'sessions/ios/ios_serialized_navigation_driver.h',
-          ],
-        },
+            'sessions/ios/ios_serialized_navigation_builder.cc',
+            'sessions/ios/ios_serialized_navigation_builder.h',
+            'sessions/ios/ios_serialized_navigation_driver.cc',
+            'sessions/ios/ios_serialized_navigation_driver.h',
+          ],
+        },
       ],
     }],
   ],
 
 }