android: Record the memory size of the GSA process.

base/android/java/src/org/chromium/base/metrics/RecordHistogram.java

Index: base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
diff --git a/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java b/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
index 7548fc5ecf65155a2cf2fb2d27cc10aa1c673dcd..0db654ff816f15c7e36da13cb647625ab25a1828 100644
--- a/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
+++ b/base/android/java/src/org/chromium/base/metrics/RecordHistogram.java
@@ -203,6 +203,19 @@ public class RecordHistogram {
     }
 
     /**
+     * Records a sample in a histogram of sizes in KB. This is the Java equivalent of the
+     * UMA_HISTOGRAM_MEMORY_KB C++ macro.
+     *
+     * Good for sizes up to 500e6 bytes.
+     *
+     * @param name name of the histogram.
+     * @param sizeInkB Sample to record in KB.
+     */
+    public static void recordMemoryKBHistogram(String name, int sizeInKB) {
+        recordCustomCountHistogram(name, sizeInKB, 1000, 500000, 50);
+    }
+
+    /**
      * Records a sample in a histogram of times with custom buckets. This is the Java equivalent of
      * the UMA_HISTOGRAM_CUSTOM_TIMES C++ macro.
      * @param name name of the histogram