Add UMA metrics to record the size of internal memory available on a user's device when the Update …

chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaUpdateInfobar.java

Index: chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaUpdateInfobar.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaUpdateInfobar.java b/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaUpdateInfobar.java
index b92947ed4af1ef36ae3b3e9e991c2132c90dc19e..b557adfe8799ba4995a867ca592e0294426b2f30 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaUpdateInfobar.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/omaha/OmahaUpdateInfobar.java
@@ -4,10 +4,15 @@
 
 package org.chromium.chrome.browser.omaha;
 
+import android.annotation.TargetApi;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Build;
+import android.os.Environment;
+import android.os.StatFs;
 import android.os.SystemClock;
 import android.util.Log;
 
@@ -18,6 +23,7 @@ import org.chromium.chrome.browser.infobar.ConfirmInfoBar;
 import org.chromium.chrome.browser.infobar.InfoBar;
 import org.chromium.chrome.browser.infobar.InfoBarListeners;
 
+import java.io.File;
 import java.util.concurrent.TimeUnit;
 
 
@@ -69,6 +75,7 @@ public class OmahaUpdateInfobar extends ConfirmInfoBar {
         mActivityContext = activityContext;
         mUrl = url;
         mShownTime = SystemClock.uptimeMillis();
+        recordInternalStorageSize();
     }
 
     private void recordHistograms(int action) {
@@ -78,6 +85,37 @@ public class OmahaUpdateInfobar extends ConfirmInfoBar {
                 SystemClock.uptimeMillis() - mShownTime, TimeUnit.MILLISECONDS);
     }
 
+    private void recordInternalStorageSize() {
+        new AsyncTask<Void, Void, Void>() {
+            @Override
+            protected Void doInBackground(Void... params) {
+                File path = Environment.getDataDirectory();
+                StatFs statFs = new StatFs(path.getAbsolutePath());
+                int size;
+                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
+                    size = getSize(statFs);
+                } else {
+                    size = getSizeUpdatedApi(statFs);
+                }
+                RecordHistogram.recordLinearCountHistogram(
+                        "GoogleUpdate.InfoBar.InternalStorageSizeAvailable", size, 1, 200, 100);
+                return null;
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+    }
+
+    @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR2)
+    private static int getSizeUpdatedApi(StatFs statFs) {
+        return (int) statFs.getAvailableBytes() / (1024 * 1024);
+    }
+
+    private static int getSize(StatFs statFs) {
+        int blockSize = statFs.getBlockSize();
+        int availableBlocks = statFs.getAvailableBlocks();
+        int size = (blockSize * availableBlocks) / (1024 * 1024);
+        return size;
+    }
+
     @Override
     public void onCloseButtonClicked() {
         mActionTaken = true;