Remove unused methods

[ Merge of http://go/wvgerrit/16405/ ]

Methods in string conversion and license request tests were not being used.
This was detected by static analysis cppcheck reports.

b/26349052

Change-Id: I44779abf6b6fdc01b5391bff7d47be1d20ef84d2

libwvdrmengine/cdm/core/include/string_conversions.h

@@ -20,7 +20,6 @@ std::string Base64SafeEncodeNoPad(const std::vector<uint8_t>& bin_input);
 std::vector<uint8_t> Base64SafeDecode(const std::string& bin_input);
 std::string HexEncode(const uint8_t* bytes, unsigned size);
 std::string IntToString(int value);
-std::string UintToString(unsigned int value);
 int64_t htonll64(int64_t x);
 inline int64_t ntohll64(int64_t x) { return htonll64(x); }
 

libwvdrmengine/cdm/core/src/string_conversions.cpp

@@ -157,18 +157,6 @@ std::string IntToString(int value) {
   return out_string;
 }
 
-std::string UintToString(unsigned int value) {
-  // log10(2) ~= 0.3 bytes needed per bit or per byte log10(2**8) ~= 2.4.
-  // So round up to allocate 3 output characters per byte.
-  const int kOutputBufSize = 3 * sizeof(unsigned int);
-  char buffer[kOutputBufSize];
-  memset(buffer, 0, kOutputBufSize);
-  snprintf(buffer, kOutputBufSize, "%u", value);
-
-  std::string out_string(buffer);
-  return out_string;
-}
-
 int64_t htonll64(int64_t x) {  // Convert to big endian (network-byte-order)
   union {
     uint32_t array[2];

libwvdrmengine/cdm/core/test/license_request.cpp

@@ -55,30 +55,4 @@ void LicenseRequest::GetDrmMessage(const std::string& response,
   }
 }
 
-// Returns heartbeat url in heartbeat_url.
-// The heartbeat url is stored as meta data in the response message.
-void LicenseRequest::GetHeartbeatUrl(const std::string& response,
-                                     std::string& heartbeat_url) {
-  if (response.empty()) {
-    heartbeat_url.clear();
-    return;
-  }
-
-  size_t header_end_pos = FindHeaderEndPosition(response);
-  if (header_end_pos != std::string::npos) {
-    header_end_pos += kTwoBlankLines.size();  // points to response body
-
-    heartbeat_url.clear();
-    size_t heartbeat_url_pos = response.find("Heartbeat-Url: ", header_end_pos);
-    if (heartbeat_url_pos != std::string::npos) {
-      heartbeat_url_pos += sizeof("Heartbeat-Url: ");
-      heartbeat_url.assign(response.substr(heartbeat_url_pos));
-    } else {
-      LOGE("heartbeat url not found");
-    }
-  } else {
-    LOGE("response body not found");
-  }
-}
-
 }  // namespace wvcdm

libwvdrmengine/cdm/core/test/license_request.h

@@ -17,7 +17,6 @@ class LicenseRequest {
   ~LicenseRequest() {};
 
   void GetDrmMessage(const std::string& response, std::string& drm_msg);
-  void GetHeartbeatUrl(const std::string& response, std::string& heartbeat_url);
 
  private:
   size_t FindHeaderEndPosition(const std::string& response) const;