Revert "[Nearby] Use common default device name creation for Windows"

This reverts commit 45e983ef.

Reason for revert: Seeing a build breakage on Windows (https://ci.chromium.org/p/chromium/builders/ci/win-archive-rel/17509). Reverting just to be safe.

Original change's description:
> [Nearby] Use common default device name creation for Windows
> 
> We previously handled default device name creation for Windows
> differently than we did for other non-Chrome OS platforms. The
> underlying reason appears to be that the Nearby Share service unit tests
> were using base::RunLoop().RunUntilIdle() instead of
> task_environment_.RunUntilIdle(). Because the hardware info fetch takes
> longer on Windows than other platforms, I suspect that was the reason
> only Windows was having issues. The correct run loop behavior was fixed
> in a previous CL.
> 
> Fixed: 1127603
> Change-Id: I1f10027696fb47d30ccfe0aa7b2ceb7c85de1393
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2407856
> Auto-Submit: Josh Nohle <nohle@chromium.org>
> Commit-Queue: James Vecore <vecore@google.com>
> Reviewed-by: James Vecore <vecore@google.com>
> Cr-Commit-Position: refs/heads/master@{#806466}

TBR=nohle@chromium.org,vecore@google.com

Change-Id: Ieafb3f36869b1e2dc0a1db70a379d51f85a67b79
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2407335Reviewed-by: Josh Nohle <nohle@chromium.org>
Commit-Queue: Josh Nohle <nohle@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806467}

chrome/browser/nearby_sharing/nearby_share_default_device_name.cc

@@ -39,7 +39,12 @@ base::Optional<std::string> GetNameFromProfile(Profile* profile) {
     return base::nullopt;
 
   name = base::UTF16ToUTF8(user->GetDisplayName());
-#else   // !defined(OS_CHROMEOS)
+#elif defined(OS_WIN)
+  // TODO(https://crbug.com/1127603): The non-Chrome OS strategy below caused
+  // Nearby Share service unit tests to crash on Windows trybots when we tried
+  // to integrate this into the Nearby Share service.
+  name = "First Last";
+#else  // !defined(OS_CHROMEOS) && !defined(OS_WIN)
   ProfileAttributesEntry* entry = nullptr;
   if (!g_browser_process->profile_manager()
            ->GetProfileAttributesStorage()
@@ -48,7 +53,7 @@ base::Optional<std::string> GetNameFromProfile(Profile* profile) {
   }
 
   name = base::UTF16ToUTF8(entry->GetLocalProfileName());
-#endif  // defined(OS_CHROMEOS)
+#endif
 
   return name.empty() ? base::nullopt : base::make_optional(name);
 }

chrome/browser/nearby_sharing/nearby_share_default_device_name_unittest.cc

@@ -83,7 +83,14 @@ TEST(NearbyShareDefaultDeviceNameTest, DefaultDeviceName) {
   EXPECT_EQ(std::string(kFakeNameFromProfile) + "'s " +
                 base::UTF16ToUTF8(ui::GetChromeOSDeviceName()),
             *device_name);
-#else   // !defined(OS_CHROMEOS)
+#elif defined(OS_WIN)
+  std::string expected_model_name = GetModelNameBlocking();
+  if (expected_model_name.empty()) {
+    EXPECT_TRUE(device_name->rfind("First Last's ", 0) == 0);
+  } else {
+    EXPECT_EQ("First Last's " + expected_model_name, device_name);
+  }
+#else   // !defined(OS_CHROMEOS) && !defined(OS_WIN)
   std::string expected_model_name = GetModelNameBlocking();
   if (expected_model_name.empty()) {
     EXPECT_TRUE(