cc: Sort the source file list of unittests.

cc/cc_tests.gyp

Index: cc/cc_tests.gyp
diff --git a/cc/cc_tests.gyp b/cc/cc_tests.gyp
index df984238e483aa5da96c2c2d4dca5ab6c6bb31ae..c78549904aa2f9858bb85c2ff7d864990365a9da 100644
--- a/cc/cc_tests.gyp
+++ b/cc/cc_tests.gyp
@@ -6,14 +6,17 @@
   'variables': {
     'chromium_code': 0,
     'cc_tests_source_files': [
-      'hash_pair_unittest.cc',
       'active_animation_unittest.cc',
+      'content_layer_unittest.cc',
       'contents_scaling_layer_unittest.cc',
       'damage_tracker_unittest.cc',
       'delay_based_time_source_unittest.cc',
-      'draw_quad_unittest.cc',
       'delegated_renderer_layer_impl_unittest.cc',
+      'draw_quad_unittest.cc',
+      'float_quad_unittest.cc',
       'frame_rate_controller_unittest.cc',
+      'gl_renderer_unittest.cc',
+      'hash_pair_unittest.cc',
       'heads_up_display_unittest.cc',
       'keyframed_animation_curve_unittest.cc',
       'layer_animation_controller_unittest.cc',
@@ -24,32 +27,29 @@
       'layer_tree_host_common_unittest.cc',
       'layer_tree_host_impl_unittest.cc',
       'layer_tree_host_unittest.cc',
+      'layer_unittest.cc',
       'math_util_unittest.cc',
-      'nine_patch_layer_unittest.cc',
       'nine_patch_layer_impl_unittest.cc',
+      'nine_patch_layer_unittest.cc',
       'occlusion_tracker_unittest.cc',
       'prioritized_texture_unittest.cc',
       'quad_culler_unittest.cc',
-      'software_renderer_unittest.cc',
       'render_pass_unittest.cc',
       'render_surface_filters_unittest.cc',
       'render_surface_unittest.cc',
-      'gl_renderer_unittest.cc',
       'resource_provider_unittest.cc',
+      'resource_update_controller_unittest.cc',
       'scheduler_state_machine_unittest.cc',
       'scheduler_unittest.cc',
       'scoped_texture_unittest.cc',
       'scrollbar_animation_controller_linear_fade_unittest.cc',
-      'solid_color_layer_impl_unittest.cc',
-      'resource_update_controller_unittest.cc',
-      'tiled_layer_impl_unittest.cc',
-      'content_layer_unittest.cc',
-      'float_quad_unittest.cc',
-      'layer_unittest.cc',
       'scrollbar_layer_unittest.cc',
+      'software_renderer_unittest.cc',
+      'solid_color_layer_impl_unittest.cc',
       'texture_copier_unittest.cc',
       'texture_layer_unittest.cc',
       'texture_uploader_unittest.cc',
+      'tiled_layer_impl_unittest.cc',
       'tiled_layer_unittest.cc',
       'tree_synchronizer_unittest.cc',
     ],