Implement the new Photo picker, part one.

chrome/android/java/src/org/chromium/chrome/browser/ChromeSwitches.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeSwitches.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeSwitches.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeSwitches.java
index adb6e2cef93c736fbb00b62e373689bc56fcd691..9c54f062a0105e1e1ed517026e616ae2621c7e06 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeSwitches.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeSwitches.java
@@ -141,6 +141,12 @@ public abstract class ChromeSwitches {
             "enable-autofill-keyboard-accessory-view";
 
     /**
+     * Enables the new picker for selecting photos from the device.
+     * Native switch - chrome::android::kEnableNewPhotoPicker.
+     */
+    public static final String ENABLE_NEW_PHOTO_PICKER = "enable-new-photo-picker";

[Michael van Ouwerkerk, 2017/03/14 15:57:27]

You can enable features with existing command line flags, no need to add this.
Something like: build/android/adb_chrome_public_command_line
--force-fieldtrials=TestTrial/TestGroup
'--enable-features=NewPhotoPicker<TestTrial'

I wrote a relevant document for Zine on this topic:
go/zine-features-command-line

[Finnur, 2017/03/15 13:25:06]

Done.

+
+    /**
      * Enables overscroll of the on screen keyboard. With this flag on, the OSK will only resize the
      * visual viewport.
      * Native switch - switches::kEnableOSKOverscroll