Prevent static mojo builds from pulling //ui/gl into mojo_shell

mojo/shell/desktop/mojo_main.cc

 // Copyright 2013 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.
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/shell/child_process.h"
 #include "mojo/shell/context.h"
 #include "mojo/shell/init.h"
 #include "mojo/shell/switches.h"
-#include "ui/gfx/switches.h"
 
 #if defined(COMPONENT_BUILD)
 #include "ui/gl/gl_surface.h"
 #endif
 
 namespace {
 
+// Copied from ui/gfx/switches.cc to avoid a dependency on //ui/gfx
+const char kEnableHarfBuzzRenderText[] = "enable-harfbuzz-rendertext";
+
 void RunApps(mojo::shell::Context* context) {
   const base::CommandLine& command_line =
       *base::CommandLine::ForCurrentProcess();
   base::CommandLine::StringVector args = command_line.GetArgs();
   for (base::CommandLine::StringVector::const_iterator it = args.begin();
        it != args.end();
        ++it) {
     context->Run(GURL(*it));
   }
 }
 
 }  // namespace
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   base::CommandLine::Init(argc, argv);
 #if defined(OS_LINUX)
   // We use gfx::RenderText from multiple threads concurrently and the pango
   // backend (currently the default on linux) is not close to threadsafe. Force
   // use of the harfbuzz backend for now.
   base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableHarfBuzzRenderText);
+      kEnableHarfBuzzRenderText);
 #endif
   mojo::shell::InitializeLogging();
 
   // TODO(vtl): Unify parent and child process cases to the extent possible.
   if (scoped_ptr<mojo::shell::ChildProcess> child_process =
           mojo::shell::ChildProcess::Create(
               *base::CommandLine::ForCurrentProcess())) {
     child_process->Main();
   } else {
 #if defined(COMPONENT_BUILD)
@@ skipping 12 matching lines @@
         shell_context.mojo_url_resolver()->SetBaseURL(
             GURL(command_line.GetSwitchValueASCII(switches::kOrigin)));
       }
 
       message_loop.PostTask(FROM_HERE, base::Bind(RunApps, &shell_context));
       message_loop.Run();
     }
   }
   return 0;
 }