Implement chrome.location.watchLocation Request Info minDistanceInMeters and minTimeInMilliseconds

This change pipes down minDistanceInMeters and minTimeInMilliseconds 
from JS land to native code. 

Each property creates a policy that indicates if a location update 
should be sent to the client. 

BUG=230943

Review URL: https://chromiumcodereview.appspot.com/17467004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@209097 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 32 insertions, 2 deletions

diff --git a/chrome/browser/extensions/api/location/location_api.cc b/chrome/browser/extensions/api/location/location_api.cc
index d547879..41a9917 100644
--- a/chrome/browser/extensions/api/location/location_api.cc
+++ b/chrome/browser/extensions/api/location/location_api.cc
@@ -6,6 +6,7 @@
 
 #include "chrome/browser/extensions/api/location/location_manager.h"
 #include "chrome/common/extensions/api/location.h"
+#include "extensions/common/error_utils.h"
 
 // TODO(vadimt): add tests.
 
@@ -15,14 +16,43 @@ namespace ClearWatch = location::ClearWatch;
 
 namespace extensions {
 
+const char kMustBePositive[] = "'*' must be 0 or greater.";
+const char kMinDistanceInMeters[] = "minDistanceInMeters";
+const char kMinTimeInMilliseconds[] = "minTimeInMilliseconds";
+
+bool IsNegative(double* value) {
+  return value && *value < 0.0;
+}
+
 bool LocationWatchLocationFunction::RunImpl() {
   scoped_ptr<WatchLocation::Params> params(
       WatchLocation::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
 
-  // TODO(vadimt): validate and use params->request_info.
+  double* min_distance_in_meters =
+      params->request_info.min_distance_in_meters.get();
+  if (IsNegative(min_distance_in_meters)) {
+    error_ = ErrorUtils::FormatErrorMessage(
+        kMustBePositive,
+        kMinDistanceInMeters);
+    return false;
+  }
+
+  double* min_time_in_milliseconds =
+      params->request_info.min_time_in_milliseconds.get();
+  if (IsNegative(min_time_in_milliseconds)) {
+    error_ = ErrorUtils::FormatErrorMessage(
+        kMustBePositive,
+        kMinTimeInMilliseconds);
+    return false;
+  }
+
+  // TODO(vadimt): validate and use params->request_info.maximumAge
   LocationManager::Get(profile())->AddLocationRequest(
-      extension_id(), params->name);
+      extension_id(),
+      params->name,
+      min_distance_in_meters,
+      min_time_in_milliseconds);
 
   return true;
 }