slave_hosts_cfg: Use new Windows GCE instances, use fewer, 16-core GCE instances

tools/tests/factory_configuration/expected/Build-Win7-VS2010-x86-Release-Trybot

Index: tools/tests/factory_configuration/expected/Build-Win7-VS2010-x86-Release-Trybot
diff --git a/tools/tests/factory_configuration/expected/Build-Win7-VS2010-x86-Release-Trybot b/tools/tests/factory_configuration/expected/Build-Win7-VS2010-x86-Release-Trybot
index 272a69da647f4e32ea2e2aeab39b69606d3b9b80..b4a2ce78a6dc4938f63bac0a7480afe43ae955f4 100644
--- a/tools/tests/factory_configuration/expected/Build-Win7-VS2010-x86-Release-Trybot
+++ b/tools/tests/factory_configuration/expected/Build-Win7-VS2010-x86-Release-Trybot
@@ -1,7 +1,7 @@
 {
     'TargetPath': <Object>,
     '_build_targets': [
-        'everything',
+        'most',
     ],
     '_builder_name': 'Build-Win7-VS2010-x86-Release-Trybot',
     '_common_args': [
@@ -265,13 +265,13 @@
                     '--bench_pictures_cfg',
                     'default',
                     '--target',
-                    'everything',
+                    'most',
                     '--gyp_defines',
                     'skia_arch_width=32 qt_sdk=C:/Qt/4.8.5/ skia_warnings_as_errors=1 skia_win_debuggers_path=c:/DbgHelp',
                     '--flavor',
                     'default',
                 ],
-                'description': 'BuildEverything',
+                'description': 'BuildMost',
                 'doStepIf': <Object>,
                 'env': {},
                 'exception_on_failure': <Object>,
@@ -377,13 +377,13 @@
                     '--bench_pictures_cfg',
                     'default',
                     '--target',
-                    'everything',
+                    'most',
                     '--gyp_defines',
                     'skia_arch_width=32 qt_sdk=C:/Qt/4.8.5/ skia_warnings_as_errors=1 skia_win_debuggers_path=c:/DbgHelp',
                     '--flavor',
                     'default',
                 ],
-                'description': 'Retry_BuildEverything',
+                'description': 'Retry_BuildMost',
                 'doStepIf': <Object>,
                 'env': {},
                 'exception_on_failure': <Object>,
@@ -489,13 +489,13 @@
                     '--bench_pictures_cfg',
                     'default',
                     '--target',
-                    'everything',
+                    'most',
                     '--gyp_defines',
                     'skia_arch_width=32 qt_sdk=C:/Qt/4.8.5/ skia_warnings_as_errors=0 skia_win_debuggers_path=c:/DbgHelp',
                     '--flavor',
                     'default',
                 ],
-                'description': 'Retry_NoWarningsAsErrors_BuildEverything',
+                'description': 'Retry_NoWarningsAsErrors_BuildMost',
                 'doStepIf': <Object>,
                 'env': {},
                 'exception_on_failure': <Object>,