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

blimp/client/compositor/blimp_compositor_android.h

Index: blimp/client/compositor/blimp_compositor_android.h
diff --git a/blimp/client/compositor/blimp_compositor_android.h b/blimp/client/compositor/blimp_compositor_android.h
index f2c1f19719a21db59498153332ca12028ec6e4e9..20bc1a7b2ec9ee8f0cb1610f465bc7db8b7b8055 100644
--- a/blimp/client/compositor/blimp_compositor_android.h
+++ b/blimp/client/compositor/blimp_compositor_android.h
@@ -21,6 +21,7 @@ class LayerTreeHost;
 }
 
 namespace blimp {
+namespace client {
 
 class RenderWidgetFeature;
 
@@ -68,6 +69,7 @@ class BlimpCompositorAndroid : public BlimpCompositor {
   DISALLOW_COPY_AND_ASSIGN(BlimpCompositorAndroid);
 };
 
+}  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_COMPOSITOR_BLIMP_COMPOSITOR_ANDROID_H_