Make ninja + clang + goma work

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 3490 matching lines @@
       },
     }],
     ['enable_new_npdevice_api==1', {
       'target_defaults': {
         'defines': [
           'ENABLE_NEW_NPDEVICE_API',
         ],
       },
     }],
     ['clang==1', {
-      'make_global_settings': [
-        ['CC', '<(make_clang_dir)/bin/clang'],
-        ['CXX', '<(make_clang_dir)/bin/clang++'],
-        ['LINK', '$(CXX)'],
-        ['CC.host', '$(CC)'],
-        ['CXX.host', '$(CXX)'],
-        ['LINK.host', '$(LINK)'],
+      'conditions': [
+        ['OS=="android"', {
+          # Android could use the goma with clang.
+          'make_global_settings': [
+            ['CC', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} ${CHROME_SRC}/<(make_clang_dir)/bin/clang)'],
+            ['CXX', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} ${CHROME_SRC}/<(make_clang_dir)/bin/clang++)'],
+            ['LINK', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} ${CHROME_SRC}/<(make_clang_dir)/bin/clang++)'],
+            ['CC.host', '$(CC)'],
+            ['CXX.host', '$(CXX)'],
+            ['LINK.host', '$(LINK)'],
+          ],
+        }, {
+          'make_global_settings': [
+            ['CC', '<(make_clang_dir)/bin/clang'],
+            ['CXX', '<(make_clang_dir)/bin/clang++'],
+            ['LINK', '$(CXX)'],
+            ['CC.host', '$(CC)'],
+            ['CXX.host', '$(CXX)'],
+            ['LINK.host', '$(LINK)'],
+          ],
+        }],
       ],
     }],
     ['OS=="android" and clang==0', {
       # Hardcode the compiler names in the Makefile so that
       # it won't depend on the environment at make time.
       'make_global_settings': [
         ['CC', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} <(android_toolchain)/*-gcc)'],
         ['CXX', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} <(android_toolchain)/*-g++)'],
         ['LINK', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} <(android_toolchain)/*-gcc)'],
         ['CC.host', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} <!(which gcc))'],
@@ skipping 41 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }