[Android] Add an option to view the tracing record categories when running from python script.

content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java

Index: content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java b/content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java
index f26b274165437d100d0f912eaf62d68f0c2a4e32..313309106a1943611dcaa4a09bc132cf7fecc5d5 100644
--- a/content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java
+++ b/content/public/android/java/src/org/chromium/content/browser/TracingControllerAndroid.java
@@ -46,6 +46,7 @@ public class TracingControllerAndroid {
 
     private static final String ACTION_START = "GPU_PROFILER_START";
     private static final String ACTION_STOP = "GPU_PROFILER_STOP";
+    private static final String ACTION_GET_CATEGORY = "GPU_PROFILER_LIST_CATEGORY";
     private static final String FILE_EXTRA = "file";
     private static final String CATEGORIES_EXTRA = "categories";
     private static final String RECORD_CONTINUOUSLY_EXTRA = "continuous";
@@ -152,6 +153,12 @@ public class TracingControllerAndroid {
         return startTracing(filePath, showToasts, categories, recordContinuously);
     }
 
+    private void initializeNativeControllerIfNeeded() {
+        if (mNativeTracingControllerAndroid == 0) {
+            mNativeTracingControllerAndroid = nativeInit();
+        }
+    }
+
     /**
      * Start profiling to the specified file. Returns true on success.
      *
@@ -177,9 +184,7 @@ public class TracingControllerAndroid {
             return false;
         }
         // Lazy initialize the native side, to allow construction before the library is loaded.
-        if (mNativeTracingControllerAndroid == 0) {
-            mNativeTracingControllerAndroid = nativeInit();
-        }
+        initializeNativeControllerIfNeeded();
         if (!nativeStartTracing(mNativeTracingControllerAndroid, categories,
                 recordContinuously)) {
             logAndToastError(mContext.getString(R.string.profiler_error_toast));
@@ -218,6 +223,29 @@ public class TracingControllerAndroid {
         mFilename = null;
     }
 
+    /**
+     * Get known category groups.
+     */
+    public void getCategoryGroups() {
+        // Lazy initialize the native side, to allow construction before the library is loaded.
+        initializeNativeControllerIfNeeded();
+        if (!nativeGetKnownCategoryGroupsAsync(mNativeTracingControllerAndroid)) {
+            onCategoryGroupsReceived(null);
+            return;
+        }
+    }
+
+    /**
+     * Called by native code when we receive the result of ping for known category groups.
+     */
+    @CalledByNative
+    protected void onCategoryGroupsReceived(String categoryList) {
+        if (categoryList != null)
+            Log.i(TAG, "{\"traceCategoriesList\": " + categoryList + "}");
+        else
+            Log.i(TAG, "Failed to fetch tracing category list.");
+    }
+
     @Override
     protected void finalize() {
         if (mNativeTracingControllerAndroid != 0) {
@@ -240,6 +268,7 @@ public class TracingControllerAndroid {
         TracingIntentFilter(Context context) {
             addAction(context.getPackageName() + "." + ACTION_START);
             addAction(context.getPackageName() + "." + ACTION_STOP);
+            addAction(context.getPackageName() + "." + ACTION_GET_CATEGORY);
         }
     }
 
@@ -264,6 +293,8 @@ public class TracingControllerAndroid {
                 }
             } else if (intent.getAction().endsWith(ACTION_STOP)) {
                 stopTracing();
+            } else if (intent.getAction().endsWith(ACTION_GET_CATEGORY)) {
+                getCategoryGroups();
             } else {
                 Log.e(TAG, "Unexpected intent: " + intent);
             }
@@ -276,5 +307,6 @@ public class TracingControllerAndroid {
     private native boolean nativeStartTracing(
             long nativeTracingControllerAndroid, String categories, boolean recordContinuously);
     private native void nativeStopTracing(long nativeTracingControllerAndroid, String filename);
+    private native boolean nativeGetKnownCategoryGroupsAsync(long nativeTracingControllerAndroid);
     private native String nativeGetDefaultCategories();
 }