Remove redundant field initialization in Java code.

chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelBase.java

Index: chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelBase.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelBase.java b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelBase.java
index 52ab333fd3fb9e5a4c6abbc65de2361c6a5c65c6..eb333010f4cf1a24567d5f3884f525f2749d5d29 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelBase.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/compositor/bottombar/OverlayPanelBase.java
@@ -109,7 +109,7 @@ abstract class OverlayPanelBase {
      * The Y coordinate to apply to the Base Page in order to keep the selection
      * in view when the Overlay Panel is in its EXPANDED state.
      */
-    private float mBasePageTargetY = 0.f;
+    private float mBasePageTargetY;
 
     /** The current context. */
     protected final Context mContext;
@@ -388,8 +388,8 @@ abstract class OverlayPanelBase {
     private boolean mIsBarBorderVisible;
     private float mBarBorderHeight;
 
-    private boolean mBarShadowVisible = false;
-    private float mBarShadowOpacity = 0.f;
+    private boolean mBarShadowVisible;
+    private float mBarShadowOpacity;
 
     private float mArrowIconOpacity;
 
@@ -485,7 +485,7 @@ abstract class OverlayPanelBase {
     // Base Page states
     // --------------------------------------------------------------------------------------------
 
-    private float mBasePageY = 0.0f;
+    private float mBasePageY;
     private float mBasePageBrightness = 1.0f;
 
     /**