[Nearby] Update wording in Nearby Share Service to be C++ style.

Updated variable names in ShareTargetDiscoveryCallback and
TransferUpdateCallback to be consistent with C++ style guide.

Change-Id: I92d7994630dfee0d80f78ebeddbcb2d6d627b145
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2361844
Commit-Queue: Juliet Levesque <julietlevesque@google.com>
Reviewed-by: Josh Nohle <nohle@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800320}

chrome/browser/nearby_sharing/share_target_discovered_callback.h

@@ -11,9 +11,9 @@
 // Reports newly discovered devices.
 class ShareTargetDiscoveredCallback : public base::CheckedObserver {
  public:
-  virtual void OnShareTargetDiscovered(ShareTarget shareTarget) = 0;
+  virtual void OnShareTargetDiscovered(ShareTarget share_target) = 0;
 
-  virtual void OnShareTargetLost(ShareTarget shareTarget) = 0;
+  virtual void OnShareTargetLost(ShareTarget share_target) = 0;
 };
 
 #endif  // CHROME_BROWSER_NEARBY_SHARING_SHARE_TARGET_DISCOVERED_CALLBACK_H_

chrome/browser/nearby_sharing/transfer_update_callback.h

@@ -9,11 +9,11 @@
 #include "chrome/browser/nearby_sharing/share_target.h"
 #include "chrome/browser/nearby_sharing/transfer_metadata.h"
 
-// Reports the transfer status for an ongoing transfer with a |ShareTarget|.
+// Reports the transfer status for an ongoing transfer with a |share_target|.
 class TransferUpdateCallback : public base::CheckedObserver {
  public:
-  virtual void OnTransferUpdate(const ShareTarget& shareTarget,
-                                const TransferMetadata& transferMetadata) = 0;
+  virtual void OnTransferUpdate(const ShareTarget& share_target,
+                                const TransferMetadata& transfer_metadata) = 0;
 };
 
 #endif  // CHROME_BROWSER_NEARBY_SHARING_TRANSFER_UPDATE_CALLBACK_H_