Make nanobench and dm be usable from Chromium build

tools/iOSShell.cpp

Index: tools/iOSShell.cpp
diff --git a/tools/iOSShell.cpp b/tools/iOSShell.cpp
index 8656e645aae5174dc4123733405fa6fddc57df0b..99d5ebd29acdad95df95273c3919aae807241d9c 100644
--- a/tools/iOSShell.cpp
+++ b/tools/iOSShell.cpp
@@ -13,6 +13,8 @@
 #include "SkCommonFlags.h"
 #include "SkGraphics.h"
 #include "SkWindow.h"
+#include "dm.h"
+#include "nanobench.h"
 #include "sk_tool_utils.h"
 
 //////////////////////////////////////////////////////////////////////////////
@@ -56,9 +58,6 @@ void ShellWindow::onSizeChange() {
 DEFINE_bool(dm, false, "run dm");
 DEFINE_bool(nanobench, false, "run nanobench");
 
-int nanobench_main();
-int dm_main();
-
 IOS_launch_type set_cmd_line_args(int argc, char *argv[], const char* resourceDir) {
     SkCommandLineFlags::Parse(argc, argv);
     SetResourcePath(resourceDir);