Introduce enablePreciseMemoryInfo switch and apply it to both renderer and shared worker

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index f42b07f6b407de412548da9e223b2abf673fd3f1..8ffab904e2a7eb56bc47d1da4918d9d538eae3d6 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -449,9 +449,9 @@ const char kEnableMemoryBenchmarking[]      = "enable-memory-benchmarking";
 
 // Make the values returned to window.performance.memory more granular and more
 // up to date in shared worker. Without this flag, the memory information is
-// still available, but it is bucketized and updated less frequently.
-const char kEnableSharedWorkerMemoryInfo[] =
-    "enable-shared-worker-memory-info";
+// still available, but it is bucketized and updated less frequently. This flag
+// also applys to workers.
+const char kEnablePreciseMemoryInfo[] = "enable-precise-memory-info";
 
 // On Windows, converts the page to the currently-installed monitor profile.
 // This does NOT enable color management for images. The source is still