Use p-links for Cast help articles

Replace help center URLs with p-links. There is no change in the actual
destination pages.

Bug: 852139
Change-Id: I85176c6c2076d331ae58e10f7150ccf9c42da03e
Reviewed-on: https://chromium-review.googlesource.com/1147216Reviewed-by: Derek Cheng <imcheng@chromium.org>
Commit-Queue: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577363}

chrome/common/url_constants.cc

@@ -16,15 +16,11 @@ const char kBluetoothAdapterOffHelpURL[] =
     "https://support.google.com/chrome?p=bluetooth";
 #endif
 
-// TODO(https://crbug.com/852139): Replace this numbered link with a P-link once
-// we have one.
 const char kCastCloudServicesHelpURL[] =
-    "https://support.google.com/chromecast/answer/6320939";
+    "https://support.google.com/chromecast/?p=casting_cloud_services";
 
-// TODO(https://crbug.com/852139): Replace this numbered link with a P-link once
-// we have one.
 const char kCastNoDestinationFoundURL[] =
-    "https://support.google.com/chromecast/answer/3249268";
+    "https://support.google.com/chromecast/?p=no_cast_destination";
 
 const char kChooserBluetoothOverviewURL[] =
     "https://support.google.com/chrome?p=bluetooth";
@@ -41,7 +37,7 @@ const char kChromeHelpViaKeyboardURL[] =
     "chrome-extension://honijodknafkokifofgiaalefdiedpko/main.html";
 #else
     "https://support.google.com/chromebook/?p=help&ctx=keyboard";
-#endif  // defined(GOOGLE_CHROME_BUILD
+#endif  // defined(GOOGLE_CHROME_BUILD)
 #else
     "https://support.google.com/chrome/?p=help&ctx=keyboard";
 #endif  // defined(OS_CHROMEOS)
@@ -52,7 +48,7 @@ const char kChromeHelpViaMenuURL[] =
     "chrome-extension://honijodknafkokifofgiaalefdiedpko/main.html";
 #else
     "https://support.google.com/chromebook/?p=help&ctx=menu";
-#endif  // defined(GOOGLE_CHROME_BUILD
+#endif  // defined(GOOGLE_CHROME_BUILD)
 #else
     "https://support.google.com/chrome/?p=help&ctx=menu";
 #endif  // defined(OS_CHROMEOS)
@@ -63,7 +59,7 @@ const char kChromeHelpViaWebUIURL[] =
     "chrome-extension://honijodknafkokifofgiaalefdiedpko/main.html";
 #else
     "https://support.google.com/chromebook/?p=help&ctx=settings";
-#endif  // defined(GOOGLE_CHROME_BUILD
+#endif  // defined(GOOGLE_CHROME_BUILD)
 #else
     "https://support.google.com/chrome/?p=help&ctx=settings";
 #endif  // defined(OS_CHROMEOS)