[Blimp client] Move client code into blimp::client namespace

blimp/client/linux/blimp_main.cc

Index: blimp/client/linux/blimp_main.cc
diff --git a/blimp/client/linux/blimp_main.cc b/blimp/client/linux/blimp_main.cc
index 6c2c9fc48acc1d9105097263d835cb26f2efd70e..60f40fa38e88a611baf13ed5da305cf40544fd14 100644
--- a/blimp/client/linux/blimp_main.cc
+++ b/blimp/client/linux/blimp_main.cc
@@ -26,10 +26,10 @@ int main(int argc, const char**argv) {
 
   XInitThreads();
 
-  blimp::InitializeLogging();
-  blimp::InitializeMainMessageLoop();
+  blimp::client::InitializeLogging();
+  blimp::client::InitializeMainMessageLoop();
 
-  blimp::BlimpClientSessionLinux session;
+  blimp::client::BlimpClientSessionLinux session;
   session.GetTabControlFeature()->CreateTab(kDummyTabId);
 
   // If there is a non-switch argument to the command line, load that url.