aw: Support the platform specific key-systems.

android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java

Index: android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java b/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
index 7044cb77fcc33939376c1661c605b2b4b4902c38..15c5edbb9acb73861ac9ce164b2f746478fe77f8 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java
@@ -5,13 +5,16 @@
 package org.chromium.android_webview;
 
 import android.content.Context;
+import android.util.Log;
 
 import org.chromium.base.PathUtils;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.library_loader.ProcessInitException;
 import org.chromium.content.browser.BrowserStartupController;
+import org.chromium.media.MediaDrmBridge;
 
+import java.util.UUID;
 
 /**
  * Wrapper for the steps needed to initialize the java and native sides of webview chromium.
@@ -50,10 +53,25 @@ public abstract class AwBrowserProcess {
                 try {
                     BrowserStartupController.get(context).startBrowserProcessesSync(
                                 BrowserStartupController.MAX_RENDERERS_SINGLE_PROCESS);
+                    initializePlatformKeySystem();

[mkosiba (inactive), 2014/06/16 08:38:20]

any idea how much time this will add to our startup?

[ycheo (away), 2014/06/16 11:05:53]

Did a quick experiment using android.os.SystemClock:
- Target device/build: New N7, Master AAV76.
- Run 8 times per each case.
For  0 key systems, it takes 61 us (IMO, this is most cases).
For  1 key system,  it takes 1.5 ~ 2.3 ms (average: 1.8 ms)
For  2 key systems, it takes 1.6 ~ 4.4 ms (average: 2.4 ms)
For 10 key systems, it takes 2.0 ~ 5.3 ms (average: 2.6 ms)

                 } catch (ProcessInitException e) {
                     throw new RuntimeException("Cannot initialize WebView", e);
                 }
             }
         });
     }
+
+    private static void initializePlatformKeySystem() {
+        String[] mappings = AwResource.getConfigKeySystemUuidMapping();
+        for (String mapping : mappings) {
+            try {
+                String fragments[] = mapping.split(",");
+                String keySystem = fragments[0].trim();
+                UUID uuid = UUID.fromString(fragments[1]);
+                MediaDrmBridge.addKeySystemUuidMapping(keySystem, uuid);
+            } catch (java.lang.RuntimeException e) {
+                Log.e(TAG, "Can't parse key-system mapping: " + mapping);
+            }
+        }
+    }
 }