Setup the delegate in Chrome, so we may put chrome java functions we need in blimp to the delegate …

blimp/client/public/blimp_client_context_delegate.h

Index: blimp/client/public/blimp_client_context_delegate.h
diff --git a/blimp/client/public/blimp_client_context_delegate.h b/blimp/client/public/blimp_client_context_delegate.h
index 506d9483c19491bb8d29d54c794215aee9df91ac..db7155fc778c175883e4b7b3ce1fdfed6e03890a 100644
--- a/blimp/client/public/blimp_client_context_delegate.h
+++ b/blimp/client/public/blimp_client_context_delegate.h
@@ -6,6 +6,11 @@
 #define BLIMP_CLIENT_PUBLIC_BLIMP_CLIENT_CONTEXT_DELEGATE_H_
 
 #include "base/macros.h"
+#include "build/build_config.h"
+
+#if defined(OS_ANDROID)
+#include "base/android/jni_android.h"
+#endif  // defined(OS_ANDROID)
 
 namespace blimp {
 namespace client {
@@ -15,6 +20,11 @@ class BlimpContents;
 // functionality it needs from its embedder.
 class BlimpClientContextDelegate {
  public:
+#if defined(OS_ANDROID)
+  // Returns a Java object of the type BlimpClientContextDelegate.
+  virtual base::android::ScopedJavaLocalRef<jobject> GetJavaObject() = 0;

[David Trainor- moved to gerrit, 2016/08/03 19:39:54]

Would a static GetJavaObject(Delegate* delegate) be cleaner?  I think I've seen
both ways of doing this in Chrome.  I'm fine with either way as it won't really
be used except for the JNI bridge access.

+#endif  // defined(OS_ANDROID)
+
   virtual ~BlimpClientContextDelegate() = default;
 
   // Attaches any required base::SupportsUserData::Data to the BlimpContents.