update feature policy enum presubmit checker

Previously it uses strip_k_prefix = False in update script but
strip_k_prefix = True in the presubmit checker. This CL fixes
this bug.

Change-Id: Ibd710b55c1f21ee944840a7dec2996cd20ef87a2
Reviewed-on: https://chromium-review.googlesource.com/c/1331634
Commit-Queue: Luna Lu <loonybear@chromium.org>
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607350}

tools/metrics/histograms/enums.xml

@@ -20748,37 +20748,37 @@ Called by update_net_error_codes.py.-->
 <enum name="FeaturePolicyFeature">
 <!-- Generated from third_party/blink/public/mojom/feature_policy/feature_policy.mojom.-->
 
-  <int value="0" label="kNotFound"/>
-  <int value="1" label="kAutoplay"/>
-  <int value="2" label="kCamera"/>
-  <int value="3" label="kEncryptedMedia"/>
-  <int value="4" label="kFullscreen"/>
-  <int value="5" label="kGeolocation"/>
-  <int value="6" label="kMicrophone"/>
-  <int value="7" label="kMidiFeature"/>
-  <int value="8" label="kPayment"/>
-  <int value="9" label="kSpeaker"/>
-  <int value="10" label="kDocumentCookie"/>
-  <int value="11" label="kDocumentDomain"/>
-  <int value="12" label="kSyncScript"/>
-  <int value="13" label="kSyncXHR"/>
-  <int value="14" label="kUsb"/>
-  <int value="15" label="kAccessibilityEvents"/>
-  <int value="16" label="kWebVr"/>
-  <int value="17" label="kAccelerometer"/>
-  <int value="18" label="kAmbientLightSensor"/>
-  <int value="19" label="kGyroscope"/>
-  <int value="20" label="kMagnetometer"/>
-  <int value="21" label="kUnsizedMedia"/>
-  <int value="22" label="kLegacyImageFormats"/>
-  <int value="23" label="kUnoptimizedImages"/>
-  <int value="24" label="kAnimations"/>
-  <int value="25" label="kOversizedImages"/>
-  <int value="26" label="kPictureInPicture"/>
-  <int value="27" label="kVerticalScroll"/>
-  <int value="28" label="kDocumentWrite"/>
-  <int value="29" label="kLazyLoad"/>
-  <int value="30" label="kLayoutAnimations"/>
+  <int value="0" label="NotFound"/>
+  <int value="1" label="Autoplay"/>
+  <int value="2" label="Camera"/>
+  <int value="3" label="EncryptedMedia"/>
+  <int value="4" label="Fullscreen"/>
+  <int value="5" label="Geolocation"/>
+  <int value="6" label="Microphone"/>
+  <int value="7" label="MidiFeature"/>
+  <int value="8" label="Payment"/>
+  <int value="9" label="Speaker"/>
+  <int value="10" label="DocumentCookie"/>
+  <int value="11" label="DocumentDomain"/>
+  <int value="12" label="SyncScript"/>
+  <int value="13" label="SyncXHR"/>
+  <int value="14" label="Usb"/>
+  <int value="15" label="AccessibilityEvents"/>
+  <int value="16" label="WebVr"/>
+  <int value="17" label="Accelerometer"/>
+  <int value="18" label="AmbientLightSensor"/>
+  <int value="19" label="Gyroscope"/>
+  <int value="20" label="Magnetometer"/>
+  <int value="21" label="UnsizedMedia"/>
+  <int value="22" label="LegacyImageFormats"/>
+  <int value="23" label="UnoptimizedImages"/>
+  <int value="24" label="Animations"/>
+  <int value="25" label="OversizedImages"/>
+  <int value="26" label="PictureInPicture"/>
+  <int value="27" label="VerticalScroll"/>
+  <int value="28" label="DocumentWrite"/>
+  <int value="29" label="LazyLoad"/>
+  <int value="30" label="LayoutAnimations"/>
 </enum>
 
 <enum name="FeedbackSource">

tools/metrics/histograms/update_feature_policy_enum.py

@@ -25,4 +25,5 @@ if __name__ == '__main__':
   UpdateHistogramEnum(histogram_enum_name='FeaturePolicyFeature',
                       source_enum_path=source_file,
                       start_marker='^enum FeaturePolicyFeature {',
-                      end_marker='^};')
+                      end_marker='^};',
+                      strip_k_prefix=True)