Use the mojo::shell namespace consistently underly shell/.

shell/android/bootstrap.cc

Index: shell/android/bootstrap.cc
diff --git a/shell/android/bootstrap.cc b/shell/android/bootstrap.cc
index 823258c01a8c16e164d1b4016c3a574ef20e4157..a1c4573b8529418a1ef9c0868b15a023fb3f452f 100644
--- a/shell/android/bootstrap.cc
+++ b/shell/android/bootstrap.cc
@@ -10,6 +10,7 @@
 #include "shell/android/run_android_application_function.h"
 
 namespace mojo {
+namespace shell {
 
 void Bootstrap(JNIEnv* env,
                jobject,
@@ -28,13 +29,14 @@ bool RegisterBootstrapJni(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
+}  // namespace shell
 }  // namespace mojo
 
 JNI_EXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
   base::android::InitVM(vm);
   JNIEnv* env = base::android::AttachCurrentThread();
 
-  if (!mojo::RegisterBootstrapJni(env))
+  if (!mojo::shell::RegisterBootstrapJni(env))
     return -1;
 
   return JNI_VERSION_1_4;