Always enable optimize_jni_generation on non-WebView builds.

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 982 matching lines @@
             'enable_wifi_bootstrapping%' : 1,
         }],
 
         # Path to sas.dll, which provides the SendSAS function.
         # http://msdn.microsoft.com/en-us/library/windows/desktop/dd979761(v=vs.85).aspx
         ['target_arch=="x64"', {
           'sas_dll_path%': '<(DEPTH)/third_party/platformsdk_win7/files/redist/amd64',
         }, {
           'sas_dll_path%': '<(DEPTH)/third_party/platformsdk_win7/files/redist/x86',
         }],
+
+        # Turn on JNI generation optimizations on non-WebView builds.
+        ['OS=="android" and android_webview_build==0', {
+          'optimize_jni_generation%': 1,
+        }, {
+          'optimize_jni_generation%': 0,
+        }],
       ],
 
       # Set this to 1 to enable use of concatenated impulse responses
       # for the HRTF panner in WebAudio.
       'use_concatenated_impulse_responses': 1,
 
       # You can set the variable 'use_official_google_api_keys' to 1
       # to use the Google-internal file containing official API keys
       # for Google Chrome even in a developer build.  Setting this
       # variable explicitly to 1 will cause your build to fail if the
@@ skipping 747 matching lines @@
         # Location of the "strip" binary, used by both gyp and scripts.
         'android_strip%' : '<!(/bin/echo -n <(android_toolchain)/*-strip)',
 
         # Location of the "readelf" binary.
         'android_readelf%' : '<!(/bin/echo -n <(android_toolchain)/*-readelf)',
 
         # Determines whether we should optimize JNI generation at the cost of
         # breaking assumptions in the build system that when inputs have changed
         # the outputs should always change as well.  This is meant purely for
         # developer builds, to avoid spurious re-linking of native files.
-        'optimize_jni_generation%': 0,
+        'optimize_jni_generation%': '<(optimize_jni_generation)',
 
         # Always uses openssl.
         'use_openssl%': 1,
         'use_openssl_certs%': 1,
 
         'proprietary_codecs%': '<(proprietary_codecs)',
         'safe_browsing%': 1,
         'enable_web_speech%': 0,
         'java_bridge%': 1,
         'build_ffmpegsumo%': 0,
@@ skipping 3977 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }