chrome://gesture fixes: Fix a couple of issues with form validation.

chrome/browser/resources/gesture_config.js

Index: chrome/browser/resources/gesture_config.js
diff --git a/chrome/browser/resources/gesture_config.js b/chrome/browser/resources/gesture_config.js
index be2c1288e7f75ebaaef646e8e2e70e1182f24dbb..7255d714516f42d18ae3c162dfb2a552b4e3b2c6 100644
--- a/chrome/browser/resources/gesture_config.js
+++ b/chrome/browser/resources/gesture_config.js
@@ -58,8 +58,10 @@ GeneralConfig.prototype = {
       input.id = field.key;
       input.min = field.min || 0;
 
-      if (field.max) input.max = field.max;
-      if (field.step) input.step = field.step;
+      if (field.max)
+        input.max = field.max;
+
+      input.step = field.step || 'any';
 
       if (field.units)
         units.innerHTML = field.units;
@@ -254,22 +256,26 @@ function GestureConfig() {
     {
       key: 'fling_acceleration_curve_coefficient_0',
       label: 'Touchscreen Fling Acceleration',
-      units: 'x<sup>3</sup>'
+      units: 'x<sup>3</sup>',
+      min: '-1'
     },
     {
       key: 'fling_acceleration_curve_coefficient_1',
       label: '+',
-      units: 'x<sup>2</sup>'
+      units: 'x<sup>2</sup>',
+      min: '-1'
     },
     {
       key: 'fling_acceleration_curve_coefficient_2',
       label: '+',
-      units: 'x<sup>1</sup>'
+      units: 'x<sup>1</sup>',
+      min: '-1'
     },
     {
       key: 'fling_acceleration_curve_coefficient_3',
       label: '+',
-      units: 'x<sup>0</sup>'
+      units: 'x<sup>0</sup>',
+      min: '-1'
     },
     {
       key: 'fling_velocity_cap',
@@ -356,7 +362,8 @@ function WorkspaceCyclerConfig() {
     {
       key: 'min_brightness',
       label: 'Minimum workspace brightness (deepest & shallowest workspace)',
-      units: '%'
+      units: '%',
+      min: '-1'
     },
     {
       key: 'background_opacity',
@@ -366,7 +373,8 @@ function WorkspaceCyclerConfig() {
     {
       key: 'desktop_workspace_brightness',
       label: 'Desktop workspace brightness when cycling through workspaces',
-      units: '%'
+      units: '%',
+      min: '-1'
     },
     {
       key: 'distance_to_initiate_cycling',
@@ -410,32 +418,38 @@ function FlingConfig() {
     {
       key: 'touchscreen_alpha',
       label: 'Touchscreen fling deacceleration coefficients',
-      units: 'alpha'
+      units: 'alpha',
+      min: '-inf'
     },
     {
       key: 'touchscreen_beta',
       label: '',
-      units: 'beta'
+      units: 'beta',
+      min: '-inf'
     },
     {
       key: 'touchscreen_gamma',
       label: '',
-      units: 'gamma'
+      units: 'gamma',
+      min: '-inf'
     },
     {
       key: 'touchpad_alpha',
       label: 'Touchpad fling deacceleration coefficients',
-      units: 'alpha'
+      units: 'alpha',
+      min: '-inf'
     },
     {
       key: 'touchpad_beta',
       label: '',
-      units: 'beta'
+      units: 'beta',
+      min: '-inf'
     },
     {
       key: 'touchpad_gamma',
       label: '',
-      units: 'gamma'
+      units: 'gamma',
+      min: '-inf'
     },
   ];