[aw] Post proxy override methods to the UI thread

Bug: 918350
Change-Id: Ieac9c9e1590c4cfe8f39d9f9bdfd510b41be616e
Reviewed-on: https://chromium-review.googlesource.com/c/1392719Reviewed-by: Tobias Sargeant <tobiasjs@chromium.org>
Commit-Queue: Laís Minchillo <laisminchillo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619438}

android_webview/java/src/org/chromium/android_webview/AwProxyController.java

@@ -16,7 +16,7 @@ import java.util.concurrent.Executor;
 public class AwProxyController {
     public AwProxyController() {}
 
-    public void setProxyOverride(
+    public String setProxyOverride(
             String[][] proxyRules, String[] bypassRules, Runnable listener, Executor executor) {
         int length = (proxyRules == null ? 0 : proxyRules.length);
         String[] urlSchemes = new String[length];
@@ -31,31 +31,29 @@ public class AwProxyController {
             // proxy URLs
             proxyUrls[i] = proxyRules[i][1];
             if (proxyUrls[i] == null) {
-                throw new NullPointerException("Proxy rule " + i + " has a null url");
+                return "Proxy rule " + i + " has a null url";
             }
         }
         length = (bypassRules == null ? 0 : bypassRules.length);
         for (int i = 0; i < length; i++) {
             if (bypassRules[i] == null) {
-                throw new NullPointerException("Bypass rule " + i + " is null");
+                return "Bypass rule " + i + " is null";
             }
         }
         if (executor == null) {
-            throw new NullPointerException("Executor must not be null");
+            return "Executor must not be null";
         }
 
-        String result =
-                nativeSetProxyOverride(urlSchemes, proxyUrls, bypassRules, listener, executor);
-        if (!result.isEmpty()) {
-            throw new IllegalArgumentException(result);
-        }
+        return nativeSetProxyOverride(urlSchemes, proxyUrls, bypassRules, listener, executor);
     }
 
-    public void clearProxyOverride(Runnable listener, Executor executor) {
+    public String clearProxyOverride(Runnable listener, Executor executor) {
         if (executor == null) {
-            throw new NullPointerException("Executor must not be null");
+            return "Executor must not be null";
         }
+
         nativeClearProxyOverride(listener, executor);
+        return "";
     }
 
     @CalledByNativeUnchecked
@@ -67,4 +65,4 @@ public class AwProxyController {
     private native String nativeSetProxyOverride(String[] urlSchemes, String[] proxyUrls,
             String[] bypassRules, Runnable listener, Executor executor);
     private native void nativeClearProxyOverride(Runnable listener, Executor executor);
-}
\ No newline at end of file
+}

android_webview/support_library/java/src/org/chromium/support_lib_glue/SupportLibProxyControllerAdapter.java

@@ -5,6 +5,8 @@
 package org.chromium.support_lib_glue;
 
 import org.chromium.android_webview.AwProxyController;
+import org.chromium.android_webview.WebViewChromiumRunQueue;
+import org.chromium.base.ThreadUtils;
 import org.chromium.support_lib_boundary.ProxyControllerBoundaryInterface;
 
 import java.util.concurrent.Executor;
@@ -13,20 +15,47 @@ import java.util.concurrent.Executor;
  * Adapter between AwProxyController and ProxyControllerBoundaryInterface.
  */
 public class SupportLibProxyControllerAdapter implements ProxyControllerBoundaryInterface {
+    private final WebViewChromiumRunQueue mRunQueue;
     private final AwProxyController mProxyController;
 
-    public SupportLibProxyControllerAdapter(AwProxyController proxyController) {
+    public SupportLibProxyControllerAdapter(
+            WebViewChromiumRunQueue runQueue, AwProxyController proxyController) {
+        mRunQueue = runQueue;
         mProxyController = proxyController;
     }
 
     @Override
     public void setProxyOverride(
             String[][] proxyRules, String[] bypassRules, Runnable listener, Executor executor) {
-        mProxyController.setProxyOverride(proxyRules, bypassRules, listener, executor);
+        String result;
+        if (checkNeedsPost()) {
+            result = mRunQueue.runOnUiThreadBlocking(() -> {
+                return mProxyController.setProxyOverride(
+                        proxyRules, bypassRules, listener, executor);
+            });
+        } else {
+            result = mProxyController.setProxyOverride(proxyRules, bypassRules, listener, executor);
+        }
+        if (!result.isEmpty()) {
+            throw new IllegalArgumentException(result);
+        }
     }
 
     @Override
     public void clearProxyOverride(Runnable listener, Executor executor) {
-        mProxyController.clearProxyOverride(listener, executor);
+        String result;
+        if (checkNeedsPost()) {
+            result = mRunQueue.runOnUiThreadBlocking(
+                    () -> { return mProxyController.clearProxyOverride(listener, executor); });
+        } else {
+            result = mProxyController.clearProxyOverride(listener, executor);
+        }
+        if (!result.isEmpty()) {
+            throw new IllegalArgumentException(result);
+        }
     }
-}
\ No newline at end of file
+
+    private static boolean checkNeedsPost() {
+        return !ThreadUtils.runningOnUiThread();
+    }
+}

android_webview/support_library/java/src/org/chromium/support_lib_glue/SupportLibWebViewChromiumFactory.java

@@ -167,7 +167,8 @@ class SupportLibWebViewChromiumFactory implements WebViewProviderFactoryBoundary
         synchronized (mAwInit.getLock()) {
             if (mProxyController == null) {
                 mProxyController = BoundaryInterfaceReflectionUtil.createInvocationHandlerFor(
-                        new SupportLibProxyControllerAdapter(mAwInit.getAwProxyController()));
+                        new SupportLibProxyControllerAdapter(
+                                mAwInit.getRunQueue(), mAwInit.getAwProxyController()));
             }
         }
         return mProxyController;