Fix running gn gen for //ui/* targets on iOS.

ui/compositor/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 component("compositor") {
   sources = [
     "canvas_painter.cc",
@@ skipping 116 matching lines @@
     "//cc",
     "//cc/surfaces",
     "//cc:test_support",
     "//gpu/command_buffer/client:gl_in_process_context",
     "//gpu/command_buffer/client:gles2_c_lib",
     "//gpu/command_buffer/client:gles2_implementation",
     "//gpu/command_buffer/common:gles2_utils",
     "//gpu/skia_bindings",
     "//skia",
     "//testing/gtest",
-    "//third_party/WebKit/public:blink_minimal",

[danakj, 2015/07/22 18:25:27]

This looks historical. Do we actually need this still?

[Dirk Pranke, 2015/07/22 18:49:36]

You're suggesting maybe we never need blink headers in the compositor, even on
desktop platforms?

[danakj, 2015/07/22 19:03:14]

I don't see any includes of third_party/WebKit in ui/compositor, nor is it
allowed in DEPS anymore.

[sdefresne, 2015/07/23 07:38:03]

Done.

     "//ui/base",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 
+  if (!is_ios) {
+    deps += [ "//third_party/WebKit/public:blink_minimal" ]
+  }
+
   if (use_x11) {
     configs += [ "//build/config/linux:x11" ]
     deps += [ "//ui/gfx/x" ]
   }
 
   if (use_ozone) {
     sources += [ "test/test_compositor_host_ozone.cc" ]
   } else if (use_x11) {
     sources += [ "test/test_compositor_host_x11.cc" ]
   }
@@ skipping 28 matching lines @@
       "//ui/gfx/geometry",
       "//ui/gl",
       "//ui/resources",
     ]
 
     if (is_linux) {
       deps += [ "//third_party/mesa:osmesa" ]
     }
   }
 }