Update host compiler version info for android webview.

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 609 matching lines @@
        # Enable the Syzygy optimization step.
       'syzygy_optimize%': 0,
 
       # Enable hole punching for the protected video.
       'video_hole%': 0,
 
       # Automatically select platforms under ozone. Turn this off to
       # build only explicitly selected platforms.
       'ozone_auto_platforms%': 1,
 
+      # If this is set clang is used as host compiler, but not as target
+      # compiler. Always do this by default.
+      'host_clang%': 1,
+
       'conditions': [
-        ['android_webview_build==0', {
-          # If this is set clang is used as host compiler, but not as target
-          # compiler. Always do this by default, except when building for AOSP.
-          'host_clang%': 1,
-        }, {
-          # See http://crbug.com/377684
-          'host_clang%': 0,
-        }],
         # A flag for POSIX platforms
         ['OS=="win"', {
           'os_posix%': 0,
         }, {
           'os_posix%': 1,
         }],
 
         # A flag for BSD platforms
         ['OS=="freebsd" or OS=="openbsd"', {
           'os_bsd%': 1,
@@ skipping 891 matching lines @@
       # it takes effect here.
       ['os_posix==1 and OS!="mac" and OS!="ios" and clang==0 and asan==0 and lsan==0 and tsan==0 and msan==0 and ubsan_vptr==0', {
         'conditions': [
           ['OS=="android"', {
             # We directly set the gcc versions since we know what we use.
             'gcc_version%': 48,
           }, {
             'gcc_version%': '<!pymod_do_main(compiler_version target compiler)',
           }],
           ['android_webview_build==1', {
-            # Android WebView uses a hermetic toolchain even for host, so set it
-            # manually here.
-            'conditions': [
-              ['host_os=="mac"', {
-                'host_gcc_version%': 42,
-              }, { # linux
-                'host_gcc_version%': 46,
-              }],
-            ],
+            # Android WebView uses a hermetic clang toolchain for host builds.
+            'host_gcc_version%': 0,
           }, {  # android_webview_build!=1
             'host_gcc_version%': '<!pymod_do_main(compiler_version host compiler)',
           }],
         ],
       }, {
         'host_gcc_version%': 0,
         'gcc_version%': 0,
       }],
       ['OS=="win" and "<!pymod_do_main(dir_exists <(windows_sdk_default_path))"=="True"', {
         'windows_sdk_path%': '<(windows_sdk_default_path)',
@@ skipping 4189 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',
   },
 }