Use msvs toolchain from depot_tools.

build/standalone.gypi

Index: build/standalone.gypi
diff --git a/build/standalone.gypi b/build/standalone.gypi
index 400694486c5c42af314f2f350abc28bc6e1ffcef..3f54eb3eccc8e3fea51d485a61ea5e7402a2bffe 100644
--- a/build/standalone.gypi
+++ b/build/standalone.gypi
@@ -97,6 +97,10 @@
 
       'cfi_blacklist%': '<(base_dir)/tools/cfi/blacklist.txt',
 
+      # Set to 1 to enable fast builds.
+      # TODO(machenbach): Only configured for windows.
+      'fastbuild%': 0,
+
       # goma settings.
       # 1 to use goma.
       # If no gomadir is set, it uses the default gomadir.
@@ -155,6 +159,7 @@
     'cfi_diag%': '<(cfi_diag)',
     'cfi_blacklist%': '<(cfi_blacklist)',
     'test_isolation_mode%': '<(test_isolation_mode)',
+    'fastbuild%': '<(fastbuild)',
 
     # Add a simple extras solely for the purpose of the cctests
     'v8_extra_library_files': ['../test/cctest/test-extra.js'],
@@ -206,12 +211,8 @@
       ['OS=="win" and use_goma==1', {
         # goma doesn't support pch yet.
         'chromium_win_pch': 0,
-        # goma doesn't support PDB yet, so win_z7=1 or fastbuild=1.

[Michael Achenbach, 2015/10/30 10:44:20]

This was an old c/p that was never exercised in v8.

-        'conditions': [
-          ['win_z7==0 and fastbuild==0', {
-            'fastbuild': 1,
-          }],
-        ],
+        # goma doesn't support PDB yet.
+        'fastbuild%': 1,
       }],
       ['((v8_target_arch=="ia32" or v8_target_arch=="x64" or v8_target_arch=="x87") and \
         (OS=="linux" or OS=="mac")) or (v8_target_arch=="ppc64" and OS=="linux")', {
@@ -433,6 +434,23 @@
           }],
         ],
       }],
+      ['fastbuild!=0', {
+        'conditions': [
+          ['OS=="win" and fastbuild==1', {
+            'msvs_settings': {
+              'VCLinkerTool': {
+                # This tells the linker to generate .pdbs, so that
+                # we can get meaningful stack traces.
+                'GenerateDebugInformation': 'true',
+              },
+              'VCCLCompilerTool': {
+                # No debug info to be generated by compiler.
+                'DebugInformationFormat': '0',
+              },
+            },
+          }],
+        ],
+      }],  # fastbuild!=0
     ],
     'target_conditions': [
       ['v8_code == 0', {