content: Move MockWebClipboardImpl into content namespace.

content/test/webkit_support.cc

Index: content/test/webkit_support.cc
diff --git a/content/test/webkit_support.cc b/content/test/webkit_support.cc
index e687e57ede6fad91c58b79be48f00ff0de3aac25..d95765d9aef0ce0f847337d47431cbbd4b1a6962 100644
--- a/content/test/webkit_support.cc
+++ b/content/test/webkit_support.cc
@@ -23,6 +23,8 @@
 #include "base/test/mock_chrome_application_mac.h"
 #endif
 
+namespace content {
+
 namespace {
 
 class TestEnvironment {
@@ -54,8 +56,6 @@ TestEnvironment* test_environment;
 
 }  // namespace
 
-namespace webkit_support {
-
 void SetUpTestEnvironmentForUnitTests() {
   WebKit::WebRuntimeFeatures::enableStableFeatures(true);
   WebKit::WebRuntimeFeatures::enableExperimentalFeatures(true);
@@ -91,4 +91,4 @@ void TearDownTestEnvironment() {
   test_environment = NULL;
 }
 
-}  // namespace webkit_support
+}  // namespace content