Add BlimpView to a Chrome tab when Blimp is enabled.

blimp/client/app/android/blimp_view.h

Index: blimp/client/app/android/blimp_view.h
diff --git a/blimp/client/app/android/blimp_view.h b/blimp/client/app/android/blimp_view.h
index 5ba4875120376e99bc9aa499b7bb943634e53ede..ac530500ea1be063b9e87d806f0f7d9ad93fb2af 100644
--- a/blimp/client/app/android/blimp_view.h
+++ b/blimp/client/app/android/blimp_view.h
@@ -21,6 +21,8 @@ namespace client {
 class BlimpCompositorDependencies;
 class BlimpCompositorManager;
 class BrowserCompositor;
+
+namespace app {
 class RenderWidgetFeature;
 
 // The native component of org.chromium.blimp.BlimpView.  This builds and
@@ -40,7 +42,7 @@ class BlimpView {
             const gfx::Size& real_size,
             const gfx::Size& size,
             float dp_to_px,
-            RenderWidgetFeature* render_widget_feature);
+            blimp::client::RenderWidgetFeature* render_widget_feature);
 
   // Methods called from Java via JNI.
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& jobj);
@@ -117,6 +119,7 @@ class BlimpView {
   DISALLOW_COPY_AND_ASSIGN(BlimpView);
 };
 
+}  // namespace app
 }  // namespace client
 }  // namespace blimp