content: Move MockWebClipboardImpl into content namespace.

content/test/test_webkit_platform_support.h

Index: content/test/test_webkit_platform_support.h
diff --git a/content/test/test_webkit_platform_support.h b/content/test/test_webkit_platform_support.h
index 01dce3333cdd381a49d02cd66217b3ade2768587..89c097cbb92bcd00672c37583753b4ac44ff518b 100644
--- a/content/test/test_webkit_platform_support.h
+++ b/content/test/test_webkit_platform_support.h
@@ -19,10 +19,12 @@ namespace WebKit {
 class WebLayerTreeView;
 }
 
+namespace content {
+
 // An implementation of WebKitPlatformSupport for tests.
-class TestWebKitPlatformSupport :
-    public WebKit::WebUnitTestSupport,
-    public webkit_glue::WebKitPlatformSupportChildImpl {
+class TestWebKitPlatformSupport
+    : public WebKit::WebUnitTestSupport,
+      public webkit_glue::WebKitPlatformSupportChildImpl {
  public:
   TestWebKitPlatformSupport();
   virtual ~TestWebKitPlatformSupport();
@@ -108,4 +110,6 @@ class TestWebKitPlatformSupport :
   DISALLOW_COPY_AND_ASSIGN(TestWebKitPlatformSupport);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_TEST_TEST_WEBKIT_PLATFORM_SUPPORT_H_