Add missing field init in constructors

Adds missing field initializations detected by Eclipse IDE.

Change-Id: I5f2f32bcccb12545fc9f0b42fcec74a23dc81376
diff --git a/runtime/profiler.h b/runtime/profiler.h
index 30babe3..bd29f71 100644
--- a/runtime/profiler.h
+++ b/runtime/profiler.h
@@ -243,7 +243,7 @@
  public:
   class ProfileData {
    public:
-    ProfileData() : count_(0), method_size_(0), used_percent_(0) {}
+    ProfileData() : count_(0), method_size_(0), used_percent_(0), top_k_used_percentage_(0) {}
     ProfileData(const std::string& method_name, uint32_t count, uint32_t method_size,
       double used_percent, double top_k_used_percentage) :
       method_name_(method_name), count_(count), method_size_(method_size),