Enable DMP for system Chromium WebView on Android

android_webview/android_webview.gyp

Index: android_webview/android_webview.gyp
diff --git a/android_webview/android_webview.gyp b/android_webview/android_webview.gyp
index 90a134c091d2859b15289193dfa359d2f261a8ae..68669ce482fb4bc9496b15eab13059b89ac69d14 100644
--- a/android_webview/android_webview.gyp
+++ b/android_webview/android_webview.gyp
@@ -16,6 +16,15 @@
       'dependencies': [
         'android_webview_common',
       ],
+      'conditions': [
+        # The general approach is to allow the executable target to choose
+        # the allocator, but as in the WebView case we are building a library
+        # only, put the dependency on the allocator here
+        [ 'android_webview_build==1 and android_use_tcmalloc==1', {
+          'dependencies': [
+            '../base/allocator/allocator.gyp:allocator', ],
+        }],
+      ],
       'ldflags': [
         # fix linking to hidden symbols and re-enable this (crbug.com/157326)
         '-Wl,--no-fatal-warnings'