Add theme color for Blimp on Android.

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.tab;
 
 import android.app.Activity;
 import android.app.Application;
 import android.content.Context;
 import android.content.Intent;
@@ skipping 1096 matching lines @@
         // either be transparent, the last theme color, or the color restored from TabState.
         int themeColor = mThemeColor;
 
         // Only use the web contents for the theme color if it is known to have changed, This
         // corresponds to the didChangeThemeColor in WebContentsObserver.
         if (getWebContents() != null && didWebContentsThemeColorChange) {
             themeColor = getWebContents().getThemeColor();
             if (themeColor != 0 && !ColorUtils.isValidThemeColor(themeColor)) themeColor = 0;
         }
 
+        // Apply theme color for Blimp tab.
+        if (isBlimpTab() && getBlimpContents() != null) {
+            themeColor = getBlimpContents().getThemeColor();

[David Trainor- moved to gerrit, 2016/09/07 05:08:52]

What does isValidThemeColor do?  Do we need that?

[nyquist, 2016/09/07 15:11:04]

Turns out it checks the HSL lightness value to be < 0.94. I don't think it'd be
necessary right now, but if we add it now, we don't have to remember it later
when we add support for real theme colors.

[xingliu, 2016/09/07 17:23:36]

Added isValidThemeColor check.

+        }
+
         // Do not apply the theme color if there are any security issues on the page.
         int securityLevel = getSecurityLevel();
         if (securityLevel == ConnectionSecurityLevel.SECURITY_ERROR
                 || securityLevel == ConnectionSecurityLevel.SECURITY_WARNING
                 || securityLevel == ConnectionSecurityLevel.SECURITY_POLICY_WARNING) {
             themeColor = getDefaultThemeColor();
         }
 
         if (isShowingInterstitialPage()) themeColor = getDefaultThemeColor();
 
@@ skipping 2189 matching lines @@
     private native void nativeSetInterceptNavigationDelegate(long nativeTabAndroid,
             InterceptNavigationDelegate delegate);
     private native void nativeAttachToTabContentManager(long nativeTabAndroid,
             TabContentManager tabContentManager);
     private native void nativeAttachOverlayWebContents(
             long nativeTabAndroid, WebContents webContents, boolean visible);
     private native void nativeDetachOverlayWebContents(
             long nativeTabAndroid, WebContents webContents);
     private native boolean nativeHasPrerenderedUrl(long nativeTabAndroid, String url);
 }