Add isolate for ANGLE on all platforms.

This will be included in isolates for targets which really need it;
initially, angle_end2end_tests.

BUG=angleproject:892

Change-Id: I466455b0cc50a70980ddc09a6db2211f13774abc
Reviewed-on: https://chromium-review.googlesource.com/284361
Tested-by: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>

angle.isolate

@@ -1,6 +1,9 @@
 # Copyright 2015 The ANGLE Project Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
+# This isolate expresses the Chromium project's default runtime
+# dependencies.
 {
   'conditions': [
     ['OS=="win"', {
@@ -12,13 +15,5 @@
         ],
       },
     }],
-    ['OS=="linux"', {
-      'variables': {
-        'files': [
-          '<(PRODUCT_DIR)/lib/libEGL.so',
-          '<(PRODUCT_DIR)/lib/libGLESv2.so',
-        ],
-      },
-    }],
   ],
 }

angle_on_all_platforms.isolate

@@ -0,0 +1,21 @@
+# Copyright 2015 The ANGLE Project Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# This isolate expresses ANGLE's runtime dependencies on all platforms
+# on which it can currently compile.
+{
+  'includes': [
+    'angle.isolate',
+  ],
+  'conditions': [
+    ['OS=="linux"', {
+      'variables': {
+        'files': [
+          '<(PRODUCT_DIR)/lib/libEGL.so',
+          '<(PRODUCT_DIR)/lib/libGLESv2.so',
+        ],
+      },
+    }],
+  ],
+}