Add FilePath to base namespace.

content/public/renderer/content_renderer_client.h

Index: content/public/renderer/content_renderer_client.h
diff --git a/content/public/renderer/content_renderer_client.h b/content/public/renderer/content_renderer_client.h
index 80f215ca5cbca60a4adbf1c5a7552d9b594a6c1b..52dd68c1ae7a5322c23d61a3ed9cf0a0f21a5a79 100644
--- a/content/public/renderer/content_renderer_client.h
+++ b/content/public/renderer/content_renderer_client.h
@@ -17,10 +17,13 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebPageVisibilityState.h"
 #include "v8/include/v8.h"
 
-class FilePath;
 class GURL;
 class SkBitmap;
 
+namespace base {
+class FilePath;
+}
+
 namespace WebKit {
 class WebFrame;
 class WebMediaPlayerClient;
@@ -84,7 +87,7 @@ class CONTENT_EXPORT ContentRendererClient {
   // couldn't be loaded. This allows the embedder to show a custom placeholder.
   virtual WebKit::WebPlugin* CreatePluginReplacement(
       RenderView* render_view,
-      const FilePath& plugin_path);
+      const base::FilePath& plugin_path);
 
   // Returns true if the embedder has an error page to show for the given http
   // status code. If so |error_domain| should be set to according to WebURLError