android_webview: force clang for host targets.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 132fd7ce33a9f05a45ba714964f916d205ef11b7..e2cc9a66b1ae8c1c57b2ce8771a7610baa74960a 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -5579,6 +5579,21 @@
         ],
       },
     }],
+    # In the android webview build, force host targets to be compiled with clang
+    # as the hermetic host gcc is very old on some platforms. This is already
+    # the default on the current development version of AOSP but we force it
+    # here in case we need to compile against an older release version.
+    ['android_webview_build==1', {

[Primiano Tucci (use gerrit), 2014/10/09 14:18:12]

Shouldn't this be
android_webview_build==1 and host_clang==1 
just in case chromium goes back on his footsteps at some point?

+      'target_defaults': {
+        'target_conditions': [
+          ['_toolset=="host"', {
+            'aosp_build_settings': {
+              'LOCAL_CLANG': 'true',
+            },
+          }],
+        ],
+      },
+    }],
     # We need a special case to handle the android webview build on mac because
     # the host gcc there doesn't accept this flag, but the target gcc may
     # require it.